K-9 TUFF STUFF ProTrainer Blue 4-foot Big Dog Training Slip Lead MADE IN THE USA Walker, LA Handcrafted with 5/8" thick derby rope not thin webbing and thread Nickel-plated heavy-duty steel ring and rope clamps Available in RED, BLACK, BLUE, PURPLE, and GREEN Our exclusive ThermaBond Technology insures a durable bond on the most common stress points of an average dog training lead..