Specifications 26 PCS Screw&Bolt Extractors/Drill Bit Set includes 6 easy out style spiral flute extractors, 13 PCS bolt&nut extractors, 1 PC 1/4 hex adapter and 6 PCS drill bits. Size Nut&Bolt Extractor Size: 1/4inch, 5/16inch (8mm), 3/8 inch, 10mm, 7/16 inch (11mm), 12mm, 1/2inch, 13mm, 9/16inch (14mm), 5/8 inch (16mm), 17mm, 11/16 inch, 3/4 inch (19mm), included 3/8-1/4 hex adapter. Spiral Flute Extractors Size: 1#, 2#, 3#, 4#, 5#, 6#. Drill Bits Size: 3/32, 1/8, 5/32, 1/4, 9/32, 3/8. Material Every screw & bolt extractor is made from high hardness chrome-molybdenum steel, the cobalt drill bit is made from HSS. Note Cobalt drill bits should not used for stainless steel. The bolt extractor with unique plum-shaped internal thread design provides excellent torque and can be used to rotate fasteners with deep bolts. Function Spiral flute extractors are perfect for common fasteners, the bolt extractors are for freeing partly-exposed fasteners. The kit also includes right hand cobalt drill bits for fasteners, which can be used to help drill these fasteners. - Specifications 26 PCS Screw&Bolt Extractors/Drill Bit Set includes 6 easy out style spiral flute extractors, 13 PCS bolt&nut extractors, 1 PC 1/4 hex adapter and 6 PCS drill bits. - Size Nut&Bolt Extractor Size: 1/4inch, 5/16inch (8mm), 3/8 inch, 10mm, 7/16 inch (11mm), 12mm, 1/2inch, 13mm, 9/16inch (14mm), 5/8 inch (16mm), 17mm, 11/16 inch, 3/4 inch (19mm), included 3/8-1/4 hex adapter. Spiral Flute Extractors Size: 1#, 2#, 3#, 4#, 5#, 6#. Drill Bits Size: 3/32, 1/8, 5/32, 1/4, 9/32, 3/8. - Material Every screw & bolt extractor is made from high hardness chrome-molybdenum steel, the cobalt drill bit is made from HHS. - Note Cobalt drill bits should not used for stainless steel. The bolt extractor with unique plum-shaped internal thread design provides excellent torque and can be used to rotate fasteners with deep bolts. - Function Spiral flute extractors are perfect for common fasteners, the bolt extractors are for freeing partly-exposed fasteners. The kit also includes right hand cobalt drill bits for fasteners, which can be used to help drill these fasteners.