Extracts screws and bolts. Can be used on thread sizes from 5mm to 16mm. Removes broken fasteners without breaking or jamming. Turns broken fasteners and screws out and permits highest torque expansion. Comes complete in a blow molded case for easy transportation. Set Includes; sizes: HSS drill bits: 1/8", 3/16", 1/4", 5/16", 11/32" Extractor pins: #1, #2, #3, #4, #5 Drilling guides: G1, G2, G3, G4, G5, G6, G7, G8, G9, G10 Extractor nuts: N1, N2, N3, N4, N5