Jumbo Aluminum Compass With Snap hook. Large compass face has a 1.75 inches diameter - even good for those visually impaired 2 3/8 inches long snap hook can easily hold keys and snap to backpacks or belt loops Sturdy, aluminum body is great for outdoor and heavy-duty use - Has a mountain face design 4 1/8 inches long overall is small enough to transport anywhere, but big enough for visibility Ideal for the outdoors, hiking, hunting, fishing, children's toy, camping and more!