4 Piece HSS 4341 Screw Extractor Set w/Hardness 63-65

4 piece screw extractor set designed to remove the most stubborn, damaged, stripped, rusted, embedded or painted-over screws and bolts.For screw and bolt sizes: (#1) Screws: 3-5mm. Bolts: 1/4” (6mm). (#2) Screws: 4-8mm. Bolts: 5/16” (8mm). (#3) Screws: 5-10mm. Bolts: 3/8” (10mm). (#4) Screws: 6-12mm. Bolts: 1/2” (12mm).Made from HSS 4341 high speed steel steel with a hardness of 63-65 HRC which is harder and more durable than most screw extractors in the market.Extractors work with any drill and are simple to use. Drill a hole into the screw head or bolt with the cutting size, flip the bit to the extractor side, slowly reverse drill until the screw or bolt is removed.Essential tool for any carpenter, car or boat mechanic, woodworker, contractor or handyman.