BGS Screw & nut removal set left-hand drills, 2-18 mm, 49 pieces

"BGS technic has put together a compact 49-piece set of boring tools for various applications. Neatly organised in a sturdy plastic case. The tools are used to unscrew stripped screws, stud bolts and nuts with defective drive heads. And this is how it works: simply pre-drill the extractors to fix them to the sheared bolt head and unscrew them easily. Sharp helical grooves then ""bite"" into stuck or defective screws, nuts and bolts and loosen them. And that's what's in the case for you: 13 x left-handed extractors for nuts and bolts with defective drive heads Drive profile: Square drive Drive profile size: 10 mm (3/8"") Sizes: 1/4"", 5/16"" (8 mm), 3/8"" (10 mm), 7/16"" (11 mm), 12 mm, 1/2"", 13 mm, 9/16"" (14 mm), 5/8"" (16 mm), 17 mm, 11/16"", 3/4"" (18 mm) 13 x left-handed extractors for stripped screws and stud bolts. Drive profile: external hexagon Sizes: 1/8"" (3.2 mm), 5/32"" (4.0 mm), 3/16"" (4.8 mm), 7/32"" (5.5 mm), 1/4"" (6.5 mm), 9/32"" (7.0 mm), 5/16"" (8.0 mm), 11/32"" (8