The Hyper Tough 15-piece drive bit set is made of high-quality alloy steel for long life and maximum durability. The Quick-change adapter makes bit changing simple and quick. The regular bit sizes come in 1-inch and 2-inch lengths. The ¼” shank diameter includes Slotted, Phillips and Square tip, designed to meet the need of most DIY workers popular sizes. Set includes 1 quick release adapter, (4) 1-inch screwdriver bits PH#1; (2) PH#2; PH#3. (10) 2-inch screwdriver bits Slotted: ¼-inch & 3/8-inch; Phillips: (5) PH#2; PH#3; Square: S1 & S2. When you are ready to tackle that home project Hyper Tough is ready! Please make sure to check out the full line of Hyper Tough products at your local Walmart or on Walmart.com Hyper Tough 15 Piece Screwdriver Bit Set with Quick Release * High Quality Alloy Steel for Long Life and Maximum Durability * Quick Release Bit Holder Included * Popular Size Bits included for most DIY workers * For more information or warranty information please contact the Hyper Tough Call Center at 1-833-908-2024