Specifications:Extractor Diameter Size of Screw Stud1: 4mm 4-6mm2: 4.5mm 6-8mm3: 6.4mm 8-11mm4: 7.5mm 11-14mm5: 11mm 14-18mm6: 15mm 18-25mm7: 19mm 25-35mm8: 24mm 35-45mmTotal Length(Approx.): 52mm，56mm，66mm，75mm，81mm，90mm，100mm，100mmFeatures:This tool will remove any stud， screw， pipes and bolts from 4mm to 45mmMade from a high standard of steel being drop forged and heat treated.Comes in a blow moulded case.Ideal tool for any professional or hobbyist.Package Included:1x Set of 8 Stud screw extractors