This is an effective training device when worn under supervision. Distributes correction pressure evenly around pet's neck. Easy adjustment with detachable links. This series of quality chain is argon welded and chrome plated for maximum strength and durability. Titan® chain will not tarnish, rust, or break. Prongs unfasten to allow the collar to be placed on dog. Links may be added or removed for proper fit. Suitable for small dogs, this links on this collar are 2.0mm in diameter, with an overall collar length of 14".