6 Pieces - Works On Almost Any Size Screw6 piece set screw extractor set works with the most commonly used tip and any screw or bolt. Extra #2 for frequently used compatible backup. Premium QualityMade by H.S.S. 4341#, hardness is 55HRC for long lasting performance. Easy to UseUse a drill bit to drill a deep hole in the screw head, then reverse the screw extractor counterclockwise into the damaged screw until it comes free. EfficientScrew Extractor Kit high hardness, you can easily remove the rusty, broken viscose screw in seconds. Includes Storage CaseComes in a compact and attractive black box for convenient storage and a tasteful gift .Buy with confidence Size: 0# Remove diameter 2~3mm 1# remove diameter 3~5mm 2# Remove diameter 4~8mm 3# Remove diameter 4~8mm 4# Remove diameter 5~10mm