High-Performance Bolt Extractor Set. Perfectly suited for high-torque applications. 14 Dedicated Extractors: This set includes precision-machined extractor sockets in sizes: 3/4"(19mm), 18mm, 11/16", 17mm, 5/8"(16mm), 9/16"(14mm), 13mm, 1/2", 12mm, 7/16"(11mm), 10mm, 3/8", 5/16"(8mm), and 1/4".