• Comprehensive 49pc master extractor set.• Left-handed HSS drill bits, used to drill pilot holes (reversible drill is required).• Spiral flute extractors for use with bolts/fasteners requiring less torque.• Multi-spline extractors when higher torque or restricted access is required.• 3/8"Sq Drive reverse spiral bolt extractors designed for maximum grip of bolt and nuts.• Includes a 3/8" to 1/4"sq drive adaptor.• Contents: 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", Spiral Flutes; #1, #2, #3, #4, #5, #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", Reverse Spiral Bolt Extractors; 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).• Supplied in storage case.Comprehensive 49pc master extractor set, including Chrome Molybdenum screw, bolt, stud and nut extractors. Features left-handed HSS