Tool steel hole punch, two screw type hole makers for 3/32 and 1/16 inch holes, which are the most common sizes jewelry makers will want to make in metal. This is a handy dandy little economy punch that is good for travel or for when you need to make a few holes quickly and a Dremel isn't handy. Just dimple your metal with an awl, nail or centerpunch and then proceed to make your hole by positioning the screw bit over the dimple, and screwing down....and through. This is best for up to 20 ga metal and works best on metal that is 24 ga and up. If you are doing alot of production work and need lots of holes regularly, you need a flexshaft with a drill press, that's the way to go. This punch is great for the beader's basket, for casual, quick use. AND....it's probably the best-priced one you'll find.