INCLUDED: 25 pc 1/8" Slotted Flat Head Screwdriver Insert Bits in a plastic storage case. MEASUREMENTS: All bits are 2" (50.8mm) long with a 1/4" (6.35mm) hex shank and quick release slot. TAIWAN S2 STEEL: Made with Taiwan S2 Steel, which lasts 3x longer than regular S2 steel and 10x longer than CR-V steel based on our fatigue testing. Sample test results are shown below. IMPACT READY: Bits are impact ready; suitable for both hand tools and electric tools. US-BASED CUSTOMER SERVICE: Available by chat, email, phone, or visit us at our customer service center in La Crosse, WI. TEMO 25 pc 1/8 Inch Slotted Flat Head 2 Inch Impact Ready Screwdriver Insert Bits