Patented bit holding principle, internal dimple feature, forces bit surface to opposite side for maximum retention S2 and Alloy Steel Bits Hard stamped part numbers and sizes for easy identification...
Made of S2 Steel The Strongest Hardest Drivers Satin Chrome Sockets Gun Metal Grey Bits Heat Treated to 58-62 RC 10" Magrail TL with Lifter Ring Approved for Hand and Power Tools