969752 Silverline Screw Extractor Set 6pce

Strong, hardened GCr15 bearing steel screw extractors with tapered design for multiple fixing sizes. For use with all types of power drill in reverse mode. Reverse-threaded shafts enable combined bite and removal of broken screws and bolts in one action. Requires pilot hole of around 50% screw/bolt diameter. Includes sizes 1/8" - 1/4"/M3 - M6, 1/4" - 5/16"/M6 - M8, 5/16" - 7/16"/M8 - M11, 7/16" - 9/16"/M11 - M14, 9/16" - 3/4"/M14 - M18, 3/4'' - 1''/M18 - M24.