Wrap Pins Hook & Loop Pin Locking Devices for Open Body Turnbuckles 7/16 & 1/2 - 2-PackWrap Pins are neat hook and loop locking devices used to secure turnbuckles without messing with unruly cotter pins. Just make your adjustment, push the pin attached to the hook and loop through the hole and wrap the hook and loop strip around the turnbuckle body. Works on open body turnbuckles and Johnson's positive locking, slotted tubular turnbuckles. This size works for 1/8 diameter for 7/16, 1/2, and 5/8 threads.