F-type valve wrench steel chrome door hook wrench (commonly known as: valve wrench, valve hook, hook wrench) Type: namely proof chrome-plated copper alloy tool steel and two kinds of the products have a clean, upscale looks beautiful, strong, anti-skid (anti- down), not off constantly. Easy to use, quality assurance, reasonable prices. The power generation sector, the chemical industry the necessary tools switching valve technology the company of male production of various models of special wrench, spanner demand customized upon request.