Klein Tools 21-Piece Impact Driver Bit Set (33801B)

21-Piece Impact Driver Bit Set21-Piece driver bit set includes premium alloy steel bits for screw fastening and nut tighteningImpact-rated alloy steel construction delivers superior strength and durability for high torque applicationsPrecision machined tips engineered for secure fit in fasteners, reducing cam out and preventing roundingProFlex torsion zone energy absorbing design to reduce stress, extending bit life and improving impact performanceMODbox™ compatible storage case stacks and locks securely with other Klein Tools case sets for organized transportEnhanced magnetic bit holder maximizes magnet contact to securely retain fastenersVariety of Phillips, Slotted, Square, and TORX® bits to drive common fasteners on the job