8x17mm gunmetal plated base metal hook and 4x9mm eye clasps for jewelry making. These are sold as full hook-&-eye sets. You will receive the full measure of both hooks and eyes, to make 144 full sets of clasps. Please do not open the loop on this hook. Use a jump ring to attach this to your finishing finding. Black gunmetal color may range from gun blue to matte dark gray to shiny black metal.