The TorquePlus design is a high performance drive configuration which allows for quick and easy socket engagement to the fastener flats, not the corners. The TorquePlus configuration employs a radius-corner design, shifting contact area and stress away from the fastener corners and distributing contact stresses over a large area of the socket, minimizing slippage. The TorquePlus internal design minimizes fastener rounding, helps to extend fastener life, and allows the user to more easily turn worn, rounded, or rusted fasteners. The item "Proto J52112 3/8 Drive 13 Piece Deep Socket Set -12 Point 1/4 -1 Made In USA" is in sale since Tuesday, May 12, 2015.This item is in the category "eBay Motors\Automotive Tools & Supplies\Hand Tools\Sockets & Socket Sets". The seller is "autotoolpro21" and is located in Paramount, California. This item can be shipped worldwide.