9/16″ Shackle - **Premium UNIVERSAL Unattended Coupler Lock**

* 360° Of 'Solid Hardened Steel' Patented Dual Purpose Coupler Lock
* Fits Most Couplers (1-7/8″, 2″ to 2-5/16″)
* Ballistic Grade Nylon Housing Absorbs Hammer Blows & Protects Against Weather