Herm Sprenger Collar Neck Tech, Stainless Steel, 24-Inch, Includes 12 Links Herm Sprenger's Neck-Tech Prong design features a stainless steel collar Each piece is stamped from solid coiled stock, 24" size is adjustable This unique design imitates canine teeth, Allows the collar to have a more natural "bite" during the correction pull Significant improvement through the lockable snap hoook; Unintended opening is impossible Suitable for all short and long-haired dogs