The Hamilton Extra Heavy Choke Chain Dog Collar is a high-quality dog collar that is perfect for obedience training. Made of superior quality steel, this collar is durable and will last you many years. The pattern-dog design is easy to spot, making it easy to find your dog. The color-chrome plating makes the collar stand out, so it is easy to find in a crowd. The material-alloy steel construction is strong and durable, and the dimensions are 1 x 1 x 1 inches.