15 Pc. 1/4" & 3/8" Drive Bolt Biter™ Impact Extraction Socket Set Bi-Directional design for removing or tightening damaged fasteners. Tapered entry enables socket to easily seat on a damaged fastener. Dual sized sockets designed to work with both SAE and Metric fasteners. Square drive with hex base for use with impact , ratchet, wrench, or pliers. Chrome Molybdenum Alloy Steel (Cr-Mo) for exceptional strength and long lasting durability. High-Visibility -etched markings provide quick size identification. Black oxide coating provides superior corrosion resistance. Up to 10x longer impact life vs. competition. Up to 5x greater torque output vs. competition. Blow mold case included for durable storage and organization 84783 No -