Designed for opening fine watch cases without damaging or scratching, this handy tool is also great for quickly and safely opening battery boxes, model locomotives, key fobs and more. It might look like a knife, but the hardened, beveled steel blade is not at all sharp. Instead, its finely tapered edge is designed to easily slide between mating parts to do its job. 5-1/2" long; 7/8" diameter. Includes 2 blades and hex wrench.