Kupo KS-396 Super Knuckle Shell with Anti-theft locking knob

The Kupo KS-396 Super Knuckle Shell with Anti-theft locking knob features an aluminum construction Super Knuckle double socket arm. It offers a pin locking knob for mounting items, safe from theft and tampering. Featuring a unique security knob which uses a key to tighten the arm and one outside slip ring that needs a provided key knob to tighten or loosen.