Guan Tong- The Icon Of High Quality Strain Clamp (Bolte Type) Description Material: The clamp body and keepers are malleable iron , cotter-pin is stainless steel, the other parts are hot-dip galvanized steel. Order Tips: Please clarify cable diameter, RTS, clamp materials required when you place the order Strain Clamp (Bolt Type) Specification Company Show Guan Tong is a key player in electric power fitting industry. We manufacture and OEM electric cable clamp and accessories. The innovative spirit in our enterprise makes us not only the best one, but the first one in the section.