Product Description An assortment of round and square wire lock pin variants from The Hillman Group. Wire lock pins are a clevis pin with an attached wire loop that is pulled over the end of the pin. Full assortment contains five (5) refills comprised of Hillman item numbers #58528 - #58532. From the Manufacturer These Round-Loop Wire Lock Pins combine the benefits of a pin and cotter combination in a single, dependable assembly. They are specialty locking pins and are good for quick-release applications by simply pulling the wire loop over the pin to lock it in place. They can be used as a convenient way to adjust or remove accessories on equipment.