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Pin Hole: Uses Ret Ring or Pin & O-ring to secure socket. The most secure system available. Recommended for 3/4" drive and large impact wrenches.
Friction Ball: A spring loaded steel ball that lines up with the socket retainer hole. Use caution when using this system because the socket is held in place only by spring pressure on th steel ball.
Lock Button: Spring loaded locking device on Spline to secure socket. Socket is released by inserting object through socket face and depressing release button.
*SRD: Socket Retention Device
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