Diablo DSQ135P1 Drive Bit, #1 Drive, Square Drive, 1/4 in Shank, Hex Shank, 3-1/2 in L

Diablo's driver bit range of square bits delivers maximum performance, extreme durability and up to 50X longer life when installing and removing fasteners. An optimized tip design provides a strong, precise grip that reduces wear, stripping and slippage. MaxTorque Zone delivers ultimate torque resistance by absorbing torque, creating less stress at the tip when tightening and removing nuts and screws. This range is Impact Strong™, delivering increased shank stability and durability in cordless and corded impact and drill drivers.