T-Handle Hex Torx Keys 1,Products DetailesMaterial1.Stainless Steel: SS201, ... ,Hot Deep Galvanize(H. D. G. ) etc.Heat TreatmentTempering,Hardening,Spheroidizing,Stress Relieving.StandardISO,GB,DIN,JIS,ANSI,BSWManufacture ProcessHeading/washer assembly ...