The Ruffwear Chain Reaction Collar is a martingale-style collar that combines Ruffwear-designed TubeLok(TM) webbing and a short section of stainless steel chain. This collar provides limited correction with an audible cue, making it a great training tool. In addition to the chain attachment point, this collar also features a V-ring attachment option for use as a standard collar. Packed full of Ruffwear's essential collar features: separate ID tag attachment point with tag silencer, strong and comfortable webbing, and aluminum V-ring. Integrated reflectivity keeps dogs visible in low-light conditions. Try Ruffwear's matching Slackline(TM) Leash for the complete set up. Limited cinch design and audible correction with stainless steel chain for controlled, leashed walkingDurability and design aesthetics come together in Ruffwear-designed Tubelok(TM) webbingSingle-piece, anodized aluminum V-ring provides a secure leash attachment pointSeparate ID attachment pointEasily add or remove ID tags with Quick Ring(TM)Reduced tag jingle with silicone tag silencerLow-light visibility with reflective trim