BRAND NEW GEARWRENCH 30 PIECE BOLT BITER BOLT EXTRACTION INSERT SET #86193. 1/4″, 1/4″, -7 mm, 7 MM, -8 mm (-5/16″), 8 MM (5/16″), -3/8″, 3/8″, -10 mm, 10 MM, -11 mm (-7/16″), 11 MM (7/16″), -12 mm, 12 MM, -1/2″, 1/2″, 13 MM, -14 mm, 14 MM (-9/16″), 9/16″, -15 mm, 15 MM, -16 mm (-5/8″), 16 MM (5/8″), -17 mm, 17 MM, -11/16″, 11/16″, -19 mm (-3/4″), 19 MM (3/4″). Bi-directional design for removing or tightening damaged fasteners. Tapered entry enables insert to easily seat on a damaged fastener. Designed to work with a static, ratcheting or open-end wrench for ultimate versatility. Hex base compatible with 6 point, 12 point and spline wrenches. Ultra-thin design, 70% thinner than traditional extraction tools. Magnetic retention system for secure fit inside of wrench. Dual sized inserts designed to work with both SAE and Metric fasteners. High-visibility laser etched markings provide quick size identification. Minus-size sockets fit a wider range of damaged fasteners. Follow our store for special deals/offers! New items added daily! Please see ALL pictures, for the exact condition of the item you are purchasing. What you see in the pictures is exactly what you will receive. I check my emails often!