Canine Equipment Ultimate 1-Inch Quick Release Martingale Dog Collar, Large, Checker Board Great for training or dogs that like to back out of collars Quick release side buckle makes putting-on and taking-off quick and easy Gentle alternative to traditional choke collars Limited slip action to prevent over correcting and choking Size large fits a neck size of 16-22 inches Great for training or dogs that like to back out of collars Quick release side buckle makes putting-on and taking-off quick and easy Gentle alternative to traditional choke collars Limited slip action to prevent over correcting and choking Size large fits a neck size of 16-22-Inch