Feature●1. Materials: 101 steel, material no. 1.0338 / SAE 1008/1010, zinc-plated.●2. 2-Ear design for increased clamping range.●3. For use on rubber hoses, plastic tubing, electrical cables, air hoses and other materials.●4. De-burred edges prevent damage to clamped parts.●5. Fast, simple and safe installation.Description Size: 5/16", open and close diameter range: 7mm-9mm. Zinc plated. Equivalent to Oetikers Part # 10100008.