Makita Impact XPS is new innovation in fastening with insert bits and fastening accessories built for the demands of the professional contractor. The ImpactXPS Square Socket Adapters are designed exclusively for use with high-torque impact drivers, and are engineered to last up to 90-times longer than standard adapters. Chamfered edges of the square drive end allows for easy installation and a retention ball helps secure the socket. The high quality steel construction provides increased durability and features a matte nickel surface for best in class corrosion resistance. This set includes a 1/4" , 3/8" and 1/2" socket adapter.