GRIPEDGE RPT (Rounding Prevention Technology) bits are designed to completely replace your traditional drive tools. With RPT bits, you can get up to 50% more torque on new/ good fasteners and up to 400% more torque on stripped/damaged fasteners vs traditional bits. In an emergency situation where you don't have a suitable replacement, RPT gives you the ability to reuse a damaged fastener and tighten it back down. Each bit is made from premium S2 steel for strength and durability, has oversized roll stamped ink-filled size markings, and is coated with zinc phosphate for corrosion resistance.