Features and Benefits:

• Deep length 6-point impact socket
• Made from high quality chrome-molybdenum steel
• Heat treated for strength and durability
• Size markings are hard stamped into the socket for easy identification
• Black oxide coated for resistance against rust and corrosion

3/8" Drive x 21mm Deep Length Universal 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.