Screwdriver set, and Wheeler's are the finest available. They're made from S2 tool steel and hardened to 56-58 Rockwell "C". The 54 Hollow-ground flat bits range in size from .120"x.020" to .360"x.070", and includes doubles in the thinnest sizes. This set includes two each of the very thinnest bits, which means you'll never be stuck in the middle of a job without the proper bit. The set also includes a complete selection of Phillips, Allen, and Torx bits to cover scope rings, bases, recoil pads, and the like. The 15 "specialty bits" that are included are great for installing scope bases. Set comes with two handles made from comfortable over molded plastic, the first is a regular size handle that's good for most jobs, and the second is a slimmer, shorter "Close Quarters" handle that is good for finesse work with smaller bits. DIMENSIONS: 8 inches L x 6 inches W x 3 inches H VERSATILE: Wheeler?s engineers measured the screws on over one hundred modern and antique firearms to make sure that we offered bits for every situation FEATURES: (54) hollow-ground flat bits, (15) specialty bits, (8) Allen, (4) Phillips, (3) Torx, (1) 2 OE shaft extension and (1) hex-to-square drive adapter EASE OF USE: Hollow-ground bits have a concave shape that allows for insertion all the way into the screw slot for maximum contact INCLUDES: 2 non-slip, over molded plastic handles with a convenient hinged storage case DURABLE: Constructed of strong, S2 tool steel GUARANTEED: This product is covered by a limited lifetime warranty provided by Wheeler. Please contact Wheeler customer service for assistance