Hardened steel screw extractor – 5-piece kit for bolts and studs (3–18 mm), center drill included

3mm-18mm Steel Screw Extractor Set, Bolt and Stud Removal Tool Kit, Center Drill Bit, 5 Pieces. Center the extractor bit in the screw head and turn counterclockwise to loosen. For broken screw shafts or bolts, a pilot hole must be drilled in the center before using the extractor bit so the extractor also has something to grip. Features: Made of hardened Chrome Vanadium Steel for longer life and durability. Counterclockwise twist design. Reusable plastic carrying/storage case included. Designed to remove stubborn, rusted, stripped screws or bolts, even factory-installed carriage-type bolts without slots to remove. Material: Chrome Vanadium steel. Color: As pictured. Each bit fits sizes 1/8-1/4" (3-6mm), 1/4-5/16" (6-8mm), 5/16-7/16" (8-11mm), 7/16-9/16" (11-14mm), or 9/16-3/4" (14-18mm). 5 x Screw Extractors