This 3/4" standard extension is designed to work with Grey Pneumatic 3/4" drive sockets. 3/4 in.; Drive x 3 in.; Extension w/ Friction Ball. They also allow up to 20% more torque to be applied than on other impact sockets.
Grey Pneumatic .498 Pneumatic Hammer Spring Retainer - CP
Grey Pneumatic .401 Pneumatic Hammer Spring Retainer - IR
Grey Pneumatic .401 Pneumatic Hammer Spring Retainer - CP
