Description: Removes any screw or bolt! (phillips, flat, hex, painted & more) Durable hardened steel construction Quick & easy to use Works with any drill Removes any stripped screw in 10 seconds or less Even works on jagged , uneven, or rough breaks Self centering tip, no walking Compatible with quick connect chuck systems Specification: Material: S2 Alloy steel Size:1#,2#,3#,4# Length:5.2cmx0.9cm 5.1cmx0.6cm,8.5x6x1.8cm Package Includes: 4Pieces Screw Extractor