Kumfi Kombi Martingale Collar is a unique design with snap fastener and I.D. ring holder. The snap fastener allows you to fit the collar quickly and easily and the I.D. ring holder may be used to convert the collar into a standard none choke collar. The collar checks (stops) without chocking and the jingle of the chain act as an attentive command. Use with the head halter to help prevent pulling or for controlling problem dogs. It is available in medium size.