Screwdriver insert bit is cryo-temp hardened for longer tip life. 1/4in hex shank fits all standard bit holders and hand-held drivers. ACR ribs on bit tip reduce cam-out and bit slippage. Tip is precision formed for proper fit. No. 306192DB: Size: Slotted #3-4, Length: 1in, Shank Diameter: 1/4in, Pkg Qty: 2, Package Type: Card No. 306272DB: Size: Slotted #6-8, Length: 1in, Shank Diameter: 1/4in, Pkg Qty: 2, Package Type: Card No. 306352DB: Size: Slotted #8-10, Length: 1in, Shank Diameter: 1/4in, Pkg Qty: 2, Package Type: Card No. 306432DB: Size: Slotted #10-12, Length: 1in, Shank Diameter: 1/4in, Pkg Qty: 2, Package Type: Card No. 305622DB: Size: Square Recess #3, Length: 1in, Shank Diameter: 1/4in, Pkg Qty: 2, Package Type: Card No. 307671DB: Size: TORX T-27, Length: 1in, Shank Diameter: 1/4in, Pkg Qty: 1, Package Type: Card No. 307831DB: Size: TORX T-40, Length: 1in, Shank Diameter: 1/4in, Pkg Qty: 1, Package Type: Card No. 439661DB: Size: Clutch 5/32in, Length: 1in, Shank Diameter: 1/4in, Pkg Qty: 1, Package Type: Card No. 439581DB: Size: Clutch 3/16in, Length: 1in, Shank Diameter: 1/4in, Pkg Qty: 1, Package Type: Card