ITEM NAME:10 Piece Hex Head Long Allen Bit Set Quick Release Shank Impact Driver Drill Description: Material: S2 Length: 50mm Shank: 1/4" hex shank Type of head: Hex head Size: 5/64, 3/32, 7/64, 1/8, 9/64,5/32, 3/16, 7/32, 1/4, 5/16 The bits fit for electric screwdrivers, hand screwdrivers, electric drills, air drills and so on. The Hex Head Screwdriver Bits are made of S2 alloy steel which is a commonly used material in hardware with high hardness. Package Includes: 10 x Hex Head Long Allen Bits Note: 1. Manual measuring, please allow 1 ~ 3mm error,thank you. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the picture..Shank: 1/4" hex shank. 10 x Hex Head Long Allen Bits. Type of head: Hex head. The Hex Head Screwdriver Bits are made of S2 alloy steel which is a commonly used material in hardware with high hardness.