SUREGRIP BUTYRATE HANDLE: SK Hand Tool’s SureGrip screwdrivers feature a SureGrip handle that maximizes torque and minimizes user fatigue. The butyrate handle provides great strength and resistance to most automotive chemicals GRIP & DURABILITY: Tips of SK Hand Tool screwdrivers are vapor blasted to ensure optimal fastener grip, while the chrome-vanadium shaft will endure heavy use for a long tool life SK PROFESSIONAL QUALITY: SK hand tools, including our screwdrivers, are manufactured to rigid specifications. Quality control at every step of the production process ensures that each SK screwdriver delivers exceptional performance and meets/exceeds global standards MADE IN THE USA: All SK tools are premium quality, precision crafted and made in the USA with American steel. The limited lifetime warranty backs our high-performance tools built, to last a lifetime SET INCLUDES: P1 x 4", P2 x 4", P3 x 6" Phillips Screwdrivers and 1/4"x4", 5/16"x6", 3/16x4" Slotted Screwdrivers