diff --git a/src/Axis.php b/src/Axis.php
index 68f3198..34b3027 100644
--- a/src/Axis.php
+++ b/src/Axis.php
@@ -23,24 +23,21 @@
 
 namespace pocketmine\math;
 
-final class Axis{
-	private function __construct(){
-		//NOOP
-	}
-
-	public const Y = 0;
-	public const Z = 1;
-	public const X = 2;
+enum Axis: int{
+	case Y = 0;
+	case Z = 1;
+	case X = 2;
 
 	/**
+	 * @deprecated
 	 * Returns a human-readable string representation of the given axis.
 	 */
-	public static function toString(int $axis) : string{
+	public static function toString(Axis $axis) : string{
 		return match($axis){
 			Axis::Y => "y",
 			Axis::Z => "z",
 			Axis::X => "x",
-			default => throw new \InvalidArgumentException("Invalid axis $axis")
+			default => throw new \InvalidArgumentException("Invalid axis " . $axis->name)
 		};
 	}
 }
diff --git a/src/AxisAlignedBB.php b/src/AxisAlignedBB.php
index cf4a3e2..ae4b4cf 100644
--- a/src/AxisAlignedBB.php
+++ b/src/AxisAlignedBB.php
@@ -136,12 +136,10 @@ public function offsetCopy(float $x, float $y, float $z) : AxisAlignedBB{
 	/**
 	 * Offsets this AxisAlignedBB in the given direction by the specified distance.
 	 *
-	 * @param int $face one of the Facing::* constants
-	 *
 	 * @return $this
 	 */
-	public function offsetTowards(int $face, float $distance) : AxisAlignedBB{
-		[$offsetX, $offsetY, $offsetZ] = Facing::OFFSET[$face] ?? throw new \InvalidArgumentException("Invalid Facing $face");
+	public function offsetTowards(Facing $face, float $distance) : AxisAlignedBB{
+		[$offsetX, $offsetY, $offsetZ] = $face->offset();
 
 		return $this->offset($offsetX * $distance, $offsetY * $distance, $offsetZ * $distance);
 	}
@@ -149,7 +147,7 @@ public function offsetTowards(int $face, float $distance) : AxisAlignedBB{
 	/**
 	 * Returns an offset clone of this AxisAlignedBB.
 	 */
-	public function offsetTowardsCopy(int $face, float $distance) : AxisAlignedBB{
+	public function offsetTowardsCopy(Facing $face, float $distance) : AxisAlignedBB{
 		return (clone $this)->offsetTowards($face, $distance);
 	}
 
@@ -184,7 +182,7 @@ public function contractedCopy(float $x, float $y, float $z) : AxisAlignedBB{
 	 * @return $this
 	 * @throws \InvalidArgumentException
 	 */
-	public function extend(int $face, float $distance) : AxisAlignedBB{
+	public function extend(Facing $face, float $distance) : AxisAlignedBB{
 		match($face){
 			Facing::DOWN  => $this->minY -= $distance,
 			Facing::UP    => $this->maxY += $distance,
@@ -192,7 +190,6 @@ public function extend(int $face, float $distance) : AxisAlignedBB{
 			Facing::SOUTH => $this->maxZ += $distance,
 			Facing::WEST  => $this->minX -= $distance,
 			Facing::EAST  => $this->maxX += $distance,
-			default => throw new \InvalidArgumentException("Invalid face $face"),
 		};
 
 		return $this;
@@ -204,7 +201,7 @@ public function extend(int $face, float $distance) : AxisAlignedBB{
 	 *
 	 * @throws \InvalidArgumentException
 	 */
-	public function extendedCopy(int $face, float $distance) : AxisAlignedBB{
+	public function extendedCopy(Facing $face, float $distance) : AxisAlignedBB{
 		return (clone $this)->extend($face, $distance);
 	}
 
@@ -217,7 +214,7 @@ public function extendedCopy(int $face, float $distance) : AxisAlignedBB{
 	 * @return $this
 	 * @throws \InvalidArgumentException
 	 */
-	public function trim(int $face, float $distance) : AxisAlignedBB{
+	public function trim(Facing $face, float $distance) : AxisAlignedBB{
 		return $this->extend($face, -$distance);
 	}
 
@@ -227,20 +224,18 @@ public function trim(int $face, float $distance) : AxisAlignedBB{
 	 *
 	 * @throws \InvalidArgumentException
 	 */
-	public function trimmedCopy(int $face, float $distance) : AxisAlignedBB{
+	public function trimmedCopy(Facing $face, float $distance) : AxisAlignedBB{
 		return $this->extendedCopy($face, -$distance);
 	}
 
 	/**
 	 * Increases the dimension of the AABB along the given axis.
 	 *
-	 * @param int   $axis one of the Axis::* constants
 	 * @param float $distance Negative values reduce width, positive values increase width.
 	 *
 	 * @return $this
-	 * @throws \InvalidArgumentException
 	 */
-	public function stretch(int $axis, float $distance) : AxisAlignedBB{
+	public function stretch(Axis $axis, float $distance) : AxisAlignedBB{
 		if($axis === Axis::Y){
 			$this->minY -= $distance;
 			$this->maxY += $distance;
@@ -250,19 +245,16 @@ public function stretch(int $axis, float $distance) : AxisAlignedBB{
 		}elseif($axis === Axis::X){
 			$this->minX -= $distance;
 			$this->maxX += $distance;
-		}else{
-			throw new \InvalidArgumentException("Invalid axis $axis");
 		}
+
 		return $this;
 	}
 
 	/**
 	 * Returns a stretched copy of this bounding box.
 	 * @see AxisAlignedBB::stretch()
-	 *
-	 * @throws \InvalidArgumentException
 	 */
-	public function stretchedCopy(int $axis, float $distance) : AxisAlignedBB{
+	public function stretchedCopy(Axis $axis, float $distance) : AxisAlignedBB{
 		return (clone $this)->stretch($axis, $distance);
 	}
 
@@ -271,19 +263,16 @@ public function stretchedCopy(int $axis, float $distance) : AxisAlignedBB{
 	 * @see AxisAlignedBB::stretch()
 	 *
 	 * @return $this
-	 * @throws \InvalidArgumentException
 	 */
-	public function squash(int $axis, float $distance) : AxisAlignedBB{
+	public function squash(Axis $axis, float $distance) : AxisAlignedBB{
 		return $this->stretch($axis, -$distance);
 	}
 
 	/**
 	 * Returns a squashed copy of this bounding box.
 	 * @see AxisAlignedBB::squash()
-	 *
-	 * @throws \InvalidArgumentException
 	 */
-	public function squashedCopy(int $axis, float $distance) : AxisAlignedBB{
+	public function squashedCopy(Axis $axis, float $distance) : AxisAlignedBB{
 		return $this->stretchedCopy($axis, -$distance);
 	}
 
diff --git a/src/Facing.php b/src/Facing.php
index 134a29b..cf3f4ad 100644
--- a/src/Facing.php
+++ b/src/Facing.php
@@ -25,21 +25,21 @@
 
 use function in_array;
 
-final class Facing{
-	private function __construct(){
-		//NOOP
-	}
+enum Facing: int{
 
-	public const FLAG_AXIS_POSITIVE = 1;
+	private const FLAG_AXIS_POSITIVE = 1;
 
 	/* most significant 2 bits = axis, least significant bit = is positive direction */
-	public const DOWN =   Axis::Y << 1;
-	public const UP =    (Axis::Y << 1) | self::FLAG_AXIS_POSITIVE;
-	public const NORTH =  Axis::Z << 1;
-	public const SOUTH = (Axis::Z << 1) | self::FLAG_AXIS_POSITIVE;
-	public const WEST =   Axis::X << 1;
-	public const EAST =  (Axis::X << 1) | self::FLAG_AXIS_POSITIVE;
+	case DOWN =   Axis::Y << 1;
+	case UP =    (Axis::Y << 1) | self::FLAG_AXIS_POSITIVE;
+	case NORTH =  Axis::Z << 1;
+	case SOUTH = (Axis::Z << 1) | self::FLAG_AXIS_POSITIVE;
+	case WEST =   Axis::X << 1;
+	case EAST =  (Axis::X << 1) | self::FLAG_AXIS_POSITIVE;
 
+	/**
+	 * @deprecated use Facing::cases()
+	 */
 	public const ALL = [
 		self::DOWN,
 		self::UP,
@@ -56,6 +56,9 @@ private function __construct(){
 		self::EAST
 	];
 
+	/**
+	 * @deprecated
+	 */
 	public const OFFSET = [
 		self::DOWN  => [ 0, -1,  0],
 		self::UP    => [ 0, +1,  0],
@@ -65,6 +68,9 @@ private function __construct(){
 		self::EAST  => [+1,  0,  0]
 	];
 
+	/** 
+	 * @var Facing[][]
+	 */
 	private const CLOCKWISE = [
 		Axis::Y => [
 			self::NORTH => self::EAST,
@@ -89,67 +95,60 @@ private function __construct(){
 	/**
 	 * Returns the axis of the given direction.
 	 */
-	public static function axis(int $direction) : int{
-		return $direction >> 1; //shift off positive/negative bit
+	public static function axis(Facing $direction) : Axis{
+		return Axis::from($direction >> 1); //shift off positive/negative bit
 	}
 
 	/**
 	 * Returns whether the direction is facing the positive of its axis.
 	 */
-	public static function isPositive(int $direction) : bool{
-		return ($direction & self::FLAG_AXIS_POSITIVE) === self::FLAG_AXIS_POSITIVE;
+	public static function isPositive(Facing $direction) : bool{
+		return ($direction->value & self::FLAG_AXIS_POSITIVE) === self::FLAG_AXIS_POSITIVE;
 	}
 
 	/**
 	 * Returns the opposite Facing of the specified one.
 	 *
-	 * @param int $direction 0-5 one of the Facing::* constants
+	 * @throws \ValueError if opposite facing don't exist
 	 */
-	public static function opposite(int $direction) : int{
-		return $direction ^ self::FLAG_AXIS_POSITIVE;
+	public static function opposite(Facing $direction) : Facing{
+		return self::from($direction->value ^ self::FLAG_AXIS_POSITIVE);
 	}
 
 	/**
 	 * Rotates the given direction around the axis.
-	 *
-	 * @throws \InvalidArgumentException if not possible to rotate $direction around $axis
 	 */
-	public static function rotate(int $direction, int $axis, bool $clockwise) : int{
-		if(!isset(self::CLOCKWISE[$axis])){
-			throw new \InvalidArgumentException("Invalid axis $axis");
-		}
-		if(!isset(self::CLOCKWISE[$axis][$direction])){
-			throw new \InvalidArgumentException("Cannot rotate facing \"" . self::toString($direction) . "\" around axis \"" . Axis::toString($axis) . "\"");
-		}
-
-		$rotated = self::CLOCKWISE[$axis][$direction];
+	public static function rotate(Facing $direction, Axis $axis, bool $clockwise) : Facing{
+		$rotated = self::CLOCKWISE[$axis->value][$direction->value];
 		return $clockwise ? $rotated : self::opposite($rotated);
 	}
 
-	/**
-	 * @throws \InvalidArgumentException
-	 */
-	public static function rotateY(int $direction, bool $clockwise) : int{
+	public static function rotateY(Facing $direction, bool $clockwise) : Facing{
 		return self::rotate($direction, Axis::Y, $clockwise);
 	}
 
-	/**
-	 * @throws \InvalidArgumentException
-	 */
-	public static function rotateZ(int $direction, bool $clockwise) : int{
+	public static function rotateZ(Facing $direction, bool $clockwise) : Facing{
 		return self::rotate($direction, Axis::Z, $clockwise);
 	}
 
-	/**
-	 * @throws \InvalidArgumentException
-	 */
-	public static function rotateX(int $direction, bool $clockwise) : int{
+	public static function rotateX(Facing $direction, bool $clockwise) : Facing{
 		return self::rotate($direction, Axis::X, $clockwise);
 	}
 
+	public function offset(): array {
+		return match($this){
+			self::DOWN  => [ 0, -1,  0],
+			self::UP    => [ 0, +1,  0],
+			self::NORTH => [ 0,  0, -1],
+			self::SOUTH => [ 0,  0, +1],
+			self::WEST  => [-1,  0,  0],
+			self::EAST  => [+1,  0,  0]
+		};
+	}
+
 	/**
 	 * Validates the given integer as a Facing direction.
-	 *
+	 * @deprecated 
 	 * @throws \InvalidArgumentException if the argument is not a valid Facing constant
 	 */
 	public static function validate(int $facing) : void{
@@ -172,4 +171,4 @@ public static function toString(int $facing) : string{
 			default => throw new \InvalidArgumentException("Invalid facing $facing")
 		};
 	}
-}
+}
\ No newline at end of file
diff --git a/src/RayTraceResult.php b/src/RayTraceResult.php
index 4d0928a..156c7b1 100644
--- a/src/RayTraceResult.php
+++ b/src/RayTraceResult.php
@@ -28,12 +28,9 @@
  */
 class RayTraceResult{
 
-	/**
-	 * @param int           $hitFace one of the Facing::* constants
-	 */
 	public function __construct(
 		public AxisAlignedBB $bb,
-		public int $hitFace,
+		public Facing $hitFace,
 		public Vector3 $hitVector
 	){}
 
@@ -41,7 +38,7 @@ public function getBoundingBox() : AxisAlignedBB{
 		return $this->bb;
 	}
 
-	public function getHitFace() : int{
+	public function getHitFace() : Facing{
 		return $this->hitFace;
 	}
 
diff --git a/src/Vector3.php b/src/Vector3.php
index ca8701d..00e15e7 100644
--- a/src/Vector3.php
+++ b/src/Vector3.php
@@ -117,8 +117,8 @@ public function abs() : Vector3{
 	/**
 	 * @return Vector3
 	 */
-	public function getSide(int $side, int $step = 1){
-		[$offsetX, $offsetY, $offsetZ] = Facing::OFFSET[$side] ?? [0, 0, 0];
+	public function getSide(Facing $side, int $step = 1){
+		[$offsetX, $offsetY, $offsetZ] = $side->offset();
 
 		return $this->add($offsetX * $step, $offsetY * $step, $offsetZ * $step);
 	}
@@ -174,7 +174,7 @@ public function east(int $step = 1){
 	 * @phpstan-return \Generator<int, Vector3, void, void>
 	 */
 	public function sides(int $step = 1) : \Generator{
-		foreach(Facing::ALL as $facing){
+		foreach(Facing::cases() as $facing){
 			yield $facing => $this->getSide($facing, $step);
 		}
 	}
@@ -191,13 +191,11 @@ public function sidesArray(bool $keys = false, int $step = 1) : array{
 	/**
 	 * Yields vectors stepped out from this one in directions except those on the given axis.
 	 *
-	 * @param int $axis Facing directions on this axis will be excluded
-	 *
 	 * @return \Generator|Vector3[]
 	 * @phpstan-return \Generator<int, Vector3, void, void>
 	 */
-	public function sidesAroundAxis(int $axis, int $step = 1) : \Generator{
-		foreach(Facing::ALL as $facing){
+	public function sidesAroundAxis(Axis $axis, int $step = 1) : \Generator{
+		foreach(Facing::cases() as $facing){
 			if(Facing::axis($facing) !== $axis){
 				yield $facing => $this->getSide($facing, $step);
 			}
diff --git a/tests/phpunit/FacingTest.php b/tests/phpunit/FacingTest.php
index 9e42070..fd1b8cd 100644
--- a/tests/phpunit/FacingTest.php
+++ b/tests/phpunit/FacingTest.php
@@ -37,10 +37,10 @@ public function axisProvider() : \Generator{
 	/**
 	 * @dataProvider axisProvider
 	 *
-	 * @param int $direction
-	 * @param int $axis
+	 * @param Facing $facing
+	 * @param Axis $axis
 	 */
-	public function testAxis(int $direction, int $axis) : void{
+	public function testAxis(Facing $direction, Axis $axis) : void{
 		self::assertEquals($axis, Facing::axis($direction));
 	}
 
@@ -53,10 +53,10 @@ public function oppositeProvider() : \Generator{
 	/**
 	 * @dataProvider oppositeProvider
 	 *
-	 * @param int $dir1
-	 * @param int $dir2
+	 * @param Facing $dir1
+	 * @param Facing $dir2
 	 */
-	public function testOpposite(int $dir1, int $dir2) : void{
+	public function testOpposite(Facing $dir1, Facing $dir2) : void{
 		self::assertEquals($dir2, Facing::opposite($dir1));
 		self::assertEquals($dir1, Facing::opposite($dir2));
 	}
@@ -73,10 +73,10 @@ public function positiveProvider() : \Generator{
 	/**
 	 * @dataProvider positiveProvider
 	 *
-	 * @param int  $facing
+	 * @param Facing $facing
 	 * @param bool $positive
 	 */
-	public function testIsPositive(int $facing, bool $positive) : void{
+	public function testIsPositive(Facing $facing, bool $positive) : void{
 		self::assertEquals($positive, Facing::isPositive($facing));
 	}
 
@@ -117,12 +117,12 @@ public function rotateProvider() : \Generator{
 	/**
 	 * @dataProvider rotateProvider
 	 *
-	 * @param int  $direction
-	 * @param int  $axis
+	 * @param Facing $direction
+	 * @param Axis $axis
 	 * @param bool $clockwise
-	 * @param int  $expected
+	 * @param Facing $expected
 	 */
-	public function testRotate(int $direction, int $axis, bool $clockwise, int $expected) : void{
+	public function testRotate(Facing $direction, Axis $axis, bool $clockwise, Facing $expected) : void{
 		self::assertEquals($expected, Facing::rotate($direction, $axis, $clockwise));
 	}
 }