"VERMONT AMERICAN" SLOTTED INSERT BITExtra-hard power bits are fully hardened and tempered for extended life under constant heavy-duty use. Bit tip is precision formed for proper fit.Highlights:Manufactured from special shock-resistant alloy steel. Fully hardened and tempered to all-hard status. Tough enough to drive sheet metal and case-hardened screws. With power grove, fits all power screwdriver and variable speed drills. Screw Size: 8-10 Bit Length: 1-15/16" 2" Length - 1/4" Hex Shank Carded.