Grey Pneumatic impact sockets are designed for professional tool users
They are engineered specifically for use with impact tools
Heat treated for strength and durability
Tested to the highest specifications to deliver outstanding performance
Made from high quality chrome-molybdenum steel
3/8 in.; Drive x 5/16 in.; Square Female Pipe Plug 4-Point Impact Socket. Our impact sockets grip the fastener across a broader contact area, reducing chance of rounding off fasteners. They also allow up to 20% more torque to be applied than on other impact sockets. The shift in pressure allows us to reduce the socket wall thickness, increasing access to tight areas.