400 Grit Thin Diamond Whetstone plate, easy to take Fishing, Hunting, Camping, or used as a kitchen, garden and woodwork sharpening tool. The diamond abrasive material, more efficient than normal whetstone and less risk of damaging the edges. This card has a hole to put on a keychain or lanyard and has a groove for sharpening fishing hooks.

Size: 2.48" x .70"  x .04"