The GripEdge Tools RPT Hex Bit Sockets are designed to prevent the rounding of good hex fasteners while being able to remove damaged ones. According to the company, the sockets feature patented RPT (rounding prevention technology), delivering up to 50 percent more torque on good hex fasteners, and up to 400 percent more on damaged ones. Each bit is precision machined from S2 steel for increased strength and durability and coated for increased corrosion resistance. All sockets have oversized, roll-stamped, and ink-filled size markings for greater visibility. Available in sizes ranging from 1.5mm to 10mm and 1/16" to 3/8".