This innovative C-Rivet Set bends around obstacles and allows you to reach into awkward areas for riveting. Designed to work like the industry standard "gooseneck" style rivet sets, this is a much more versatile solution in that it allows you to instantly work with any size rivet without having to carry around a set of goosenecks. It uses standard .187" shank rivet squeezers (and dimple dies) to do the work. Drop forged from 4160 tool steel and hardened to Rockwell 48 for durability. Complete kit comes with C-SET rivet set, plus an assortment of squeezer sets in sizes: 3/32", 1/8", 5/32", 3/16", and flush. Note: when using squeezer sets and dimple dies with this unit, be sure that they are sufficiently hard to withstand percussive riveting. Some sets are not hard enough for this use.