This training collar is made from steel chain links that are argon welded and finished with chrome plating for added strength and a bright, tarnish-resistant surface. It is designed to slip over a dog's head and tighten briefly with a leash correction, then loosen again once tension is released, making it a tool for teaching leash manners rather than a everyday buckle collar. The chain construction resists rust and breakage under the repeated tension of training walks. Each collar ships as a single ready-to-use chain with no assembly or hardware installation needed. It is intended strictly for supervised training use and should not be left on a dog unattended or used to tie a dog out. Selecting a length that matches the dog's neck size with a small amount of slack is part of fitting the collar correctly before a training session.