6 Spiral Flute Extractors - For use on common fasteners where lower torque is adequate 13 Multi-Spline Extractors - For use when higher torque or a lower profile tool is needed 13 Bolt Extractors - For use when part of the fastener is exposed 16 Left-Hand Cobalt Drill Bits - Use these to drill out the interior of the fastener. They often extract the fastener by themselves. Set includes: Spiral Flute Extractors: EX-1, EX-2, EX-3, EX-4, EX-5 and EX-6 Multi-Spline Extractors: 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 Bolt Extractors: 1/4, 5/16-8mm, 3/8 - 53903, 10mm, 7/16-11mm, 12mm, 1/2, 13mm, 9/16-14mm, 5/8-16mm, 17mm, 11/16, 3/4-19mm Left-Hand Colbalt Drill Bits: 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