General description 10 pack heavy duty safety coupling pins with round wire clips, designed for secure fastening in various applications. Technical specifications Material: Carbon steel, zinc plated Diameter: 8mm (5/16") Usable length: 60mm (2-1/4") Usage Ideal for lawn, gardening, DIY projects, agriculture, truck, and towing applications. Convenient and easy to use for securing equipment, machinery, and trailer loads.