This premium chain collar provides effective training control for dogs of all sizes, from tiny puppies to large breeds. The sturdy metal slip link design features smooth, interlocked chains that distribute pressure evenly around the neck when gentle correction is needed. The durable silver-toned collar includes two O-rings - one for attaching a leash and one that allows the collar to tighten and release smoothly. The martingale-style mechanism prevents over-tightening while still providing the control needed for leash training. The classic chain construction is built to last through years of daily use, resisting rust and wear. Available in multiple sizes to ensure a proper fit for your dog's neck size and breed. This training collar helps teach proper leash manners while giving you peace of mind with its reliable construction and thoughtful design.