... , L-Type, Bamboo Shank, Better Pull-Out Resistance, 20 Years ManufacturerConcrete Nail Produce NameGalvanized Step Grooved Concrete Steel HookMaterialHigh Carbon SteelType of ShankStep ... dedicated to various galvanized step grooved concrete steel hook, l-type, bamboo shank, better pull-out resistance, 20 years manufacturer manufacturing, RUNNAIL is ...