Made for use with our 2x4 or t-post mount systems, the AR500 Target Solutions Target Lok(TM) locks are ideal for quick shooting drills, double taps, or other tactical shooting practices that can cause targets to jump off mounts. Installed onto a target's carriage bolt, a Target Lok(TM) uses a spin hook to lock against the hanger mount, holding the target in place on the mount. A. Targets, 2x4 boards, and target systems are not included with a Target Lok(TM) 3 pack. **fits all orange AR500 Target Solutions 2x4 mounts and t-post mounts Buyer assumes all responsibility for the use and misuse of the purchased targets.