Ace Nut Setters are your strong, durable partner for driving and tightening nuts, bolts and hex-head screws. Made from cold-forged and hardened Chrome Vanadium (CrV) steel. Feature a sandblasted finish for added corrosion resistance. The 1/4-inch quick-change hex shank will fit all drill chucks. Includes 10 sizes: 5/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 7/16 & 1/2-inch. Comes with a durable rubber holder for convenient storage. * Use nut setters to drive and tighten nuts, bolts and hex-head screwsIncludes 10 sizes, ranging from 5/32 to 1/2-inchMade from cold-forged and hardened chrome vanadium steelCorrosion-resistant sandblasted finish1/4 in. quick-change hex shanks fit all power drills, 1/4 in. impact drivers and hand-held driversIncludes durable rubber sleeve for storage