Remove nuts, bolts, studs that are rounded off, rusted, painted over or just impossible to remove. These extractors are made of high carbon steel with left-hand spiral teeth for maximum gripping power. Slim designs fit into recessed areas and can be used with a socket, wrench, of Vise-Grip. 6 Spiral Flute Extractors. EX-1, EX-2, EX-3, EX-4, EX-5, EX-6 13 Multi-Spline Extractors. For use when higher torque or a lower profile tool is needed. 1/8″, 5/32″, 3/16″, 7/32″, 1/4″, 9/32″, 5/16″, 11/32″, 3/8″, 13/32″, 7/16″, 15/32″, 1/2 13 Bolt Extractors For use when part of the fastener is exposed. 1/4″, 5/16″-8mm, 3/8″, 10mm, 7/16″-11mm, 12mm, 1/2″, 13mm, 9/16″-14mm, 5/8″ 16mm, 17mm, 11/16″, 3/4-19mm 16 Left-Hand Cobalt Drill Bits Use these to drill out the interior of the fastener. They often extract the fastener by themselves. 5/64″, 7/64″, 1/8″, 5/32″, 3/16″, 7/32″, 1/4″, 9/32″, 19/64″, 5/16″, 11/32″, 3/8″, 13/32″, 7/16″, 15/32″, 1/2″.