C. Sherman Johnson Wrap Pins Velcro Pin Locking Devices f/Open Body Turnbuckles 5/16" & 3/8" - 2-Pack. 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 3/32" diameter for 5/16" and 3/8" threads. Specifications for C. Sherman Johnson Wrap Pins Velcro Pin Locking Devices f/Open Body Turnbuckles 5/16in & 3/8in: Manufacturer: C. Sherman Johnson Color: Black Package Contents: C. Sherman Johnson Wrap Pins Velcro Pin Locking Devices f/Open Body Turnbuckles 5/16in & 3/8in C. Sherman Johnson WRAPC3-P: Wrap Pins Velcro Pin Locking Devices f/Open Body Turnbuckles 5/16" & 3/8" - 2-Pack