Ringbolt Hitching Key Ring My nephew wanted a large key ring for his motorboat. *He liked this. I started with 6' of 550 paracord. *I left 6" tag end of cord at the beginning and began single strand ringbolt hitching around a 1 1/2" OD steel ring. *Tied the 2 ends using a diamond knot relative. * Had about 4" of cord left over .