The Makita Impact XPS 50 Piece Impact Bit Set (T-05941) is expertly engineered to withstand the hardest hitting impact drivers (sold separately). Impact XPS bits feature precision machined tips, torque absorbing shoulder rings, an optimized torsion zone, and high-quality steel combine to deliver improved overall performance and bit life. The precision machined tips provide a superior full contact fit for improved holding power and longer life. Impact XPS bits feature unique Torque Absorbing Shoulder Power Rings help to improve bit life by absorbing and transferring torque at bit tip to the torsion zone. The bits also feature Optimized Torsion Zone geometry that facilitates an ideal transfer of impact energy for improved bit life. The cone shape designed bases with torsion power rings to distribute impact force from shank to torsion zone. The bits feature a heat-treating process that is precisely calibrated for added durability. The T-05941 includes a Magnetic Nutsetter that features a lobular design that drives along flats to reduce rounding of hex fasteners. The Insert Bit Holder features a two-piece design engineered to allow the torsion technology to fully activate. The Socket Adapter features chamfered edges of the square drive end that allow easy installation of the socket. The T-05941 also includes impact rated, black oxide finished, high strength 6-point drive deep well sockets are made from heat-treated alloy steel for extreme torque applications. Convenience features include laser etching for easy size identification, and a clear lid case with laser marked bit bars for convenient product selection.