General description 26pcs Anti-theft Bolt Extractor Socket Set is designed for removing damaged screws, nuts, and bolts. Made from durable Chrome Molybdenum Steel, this set includes various sizes of screw extractors and drill bits to tackle a wide range of tasks. Technical specifications Material: Chrome Molybdenum Steel Number of pieces: 26 Screw Extractor Sizes: 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) 6pcs Bolt Screw Extractor Sizes: 1#, 2#, 3#, 4#, 5#, 6# 6 HSS Drill Bit Sizes: 3/32", 1/8", 5/32", 1/4", 9/32", 3/8" Usage This tool is intended for removing screws, nuts, and bolts with damaged receiving threads or hexagons. Note that abrasion may occur when using this tool, so it is advisable not to use the same conical socket repeatedly for screws, nuts, and bolts of the same diameter.