Description:- Continuously variable to any diameter self-locking due to gripping surfaces staggered in reverse order and burner hole box joint, trap protection dull chrome-plated handles tested Conforms to EN/IEC 60900:2004, individually tested with 10.000V and approved for 1.000V similar to DIN ISO 8976 Elora-Chrome-Vanadium 31CrV3 / 1.2208