<p>3/8&quot; Drive x 21mm Deep Length 12-Point Impact Socket.&nbsp; Our impact sockets grip the fastener across a broader contact area, reducing chance of rounding off fasteners.&nbsp; They also allow up to 20% more torque to be applied than on other impact sockets.&nbsp; The shift in pressure allows us to reduce the socket wall thickness, increasing access to tight areas.</p> <br /> <br /> <b>This product meets the large package requirement per UPS/FedEx. The estimated shipping cost will include this fee.Max limits is $110, applied when packages with an actual weight of more than 150 pounds, or that exceed 108 inches in length, or exceed a total of 165 inches in length and girth [(2 x width) + (2 x height)] combined, as measured to determine their billable weight, are not accepted for transportation.</b>