... :al-cu,be-cu Gas repairing tools matetial:al-cu ,be-cu detailsF shape wrench (250mm),double ... -cuspecial toolscarbon steel(45# steel)anti magnetic toolsstainless steelnon sparking tools are made of cooper-aluminum alloy orcooper-beryllium alloy non ... sparking tools can avoid rise sparking when tools strike,collide,rub,with a target in explosive atmosphere or combustible vapours and ...