Heavy Duty large choker chain collar. Ideal training aid to prevent your dog from pulling whilst on the lead. Simple to fit, simple slides over dogs head. Strong metal ring for attaching lead. Available in 3 sizes. Small: 2mm x 40cm (Chihuahua, Jack Russell, Shih Tzu and similar sized breeds). Medium: 3mm x 55cm (Beagle, Standard Dachshund, Border Terrier, Springer Spaniel and similar sized breeds). Large: 4mm x 65cm (Cockapoo, German Shepherd, Golden Retriever, Labrador and similar sized breeds).