Features: Torsion Control zone - Absorbs extreme torque loads to optimise control whilst preventing fastener cam-out, extending the lifetime of your impact bit. ; Impact Performance - PTA is uniquely designed for extreme impact and torque applications. This accessory is manufactured from S2 steel, machined and heat treated; Socket Driver Adaptor - Available in 1/4", 3/8" and 1/2" drive, the socket driver adapts a socket onto your 1/4" impact driver or standard drill driver. NOTE: If using an impact driver, you MUST use an impact rated socket; Specifications:TypeSocket DriverSize1/2"Length50 mm