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 - Magnetic Extreme C-Clip Coupler - Impact rated for high torque applications, driver bit is retained with a magnet and our EXTREME strength C-Clip. Our coupler has been designed so the driver bit will NOT eject free when in use. NOTE: driver bit is NOT removable by hand, pliers will need to be used to remove the bit. For regular bit changes, use the Kincrome Quick Release Coupler Extreme Magnetic C-Clip Bit Coupler 50MM