Pettom Dog Prong Training Collar Adjustable Choke Chain Pinch Pet Collar 22 Inches with Quick Release Snap Buckle Adjustable: Corrosion resistant surface, this collar is 22 inches for Large Dog, so please measure your dog neck size before purchase. You can add or remove individual links from the collar as needed to fit your dog's neck. Nylon loop instead of ordinary chain. Comfort design with quick release snap buckle, offering easy-on and easy-off in a second. Two D-rings for leash attachment. Application: Pull the training dog collar and the dog will stop immediately, The prong collar is great for training aggressive dogs, which are difficult to cope with. Safety and Convenience, Smooth prongs safer than rubber tips (shedding and eating). Safe: Dog pinch collar prongs are smooth and rounded to ensure that no harm comes to your pet while still ensuring that they will pull significantly less while walking.Designed to correct with even pressure all the way around the dogs neck to protect the trachea and other sensitive areas. Easy controll: Gentle to firm pull allows collar to communicate to dog your desired actions; Uses prongs for gentle correction. Prong collar is chrome-plated for durability and smooth &amp; rounded prongs to prevent injury. These great training aids provide a heavy-duty yet safe alternative to standard choke chains. Ruggedly constructed of electronically welded steel for added strength. Will not rust, tarnish or break. This collar is longer than other collars. Measures 22-inch length by 3-inch width. CONVENIENT DESIGN. Easy adjustment with detachable links EFFECTIVE AND SAFE TRAINING. You only have to pull the training collar and the dog will stop immediately. The training collar is great for training aggressive dogs. Nylon loop instead of ordinary chain. Quick release buckle for better handling, it can be easily and quickly put on or removed from the dog Two O-rings for leash attachment. Prongs evenly arranged around the collar.You can remove and add back pongs from the collar as needed to fit your dog&#039;s neck. it is very esay to remove or add prongs, you can watch the left picture to do it. you also can use tool to remove or add it.