Tapered Fluted Extractor Set Designed to remove broken studs, screws, pipe and pipe fittings quickly and easily.. Has gradual taper and long flutes. Forged from alloy steel. Set Contains: . (441-1) USS Screw Stud/Bolt Size: 1/4” and 5/16”, Drill Size: 1/8”, Minimum Depth of Hole: 3/8”.. (441-2) USS Screw Stud/Bolt Size: 3/8”; Drill Size: 3/16”, Minimum Depth of Hole: 1/2”.. (441-3) USS Screw Stud/Bolt Size: 7/16”, Drill Size: 15/64”, Minimum Depth of Hole: 1/2”, Pipe Size: 1/8”.. (441-4) USS Screw Stud/Bolt Size: 1/2” and 9/16”, Drill Size: 5/16”, Minimum Depth of Hole: 1/2”, Pipe Size: 1/4”.. (441-5) USS Screw Stud/Bolt Size: 5/8”, Drill Size: 3/8”, Minimum Depth of Hole: 5/8”, Pipe Size: 3/8”. 300 Yes - LEAD AND LEAD COMPOUNDS