S&W 103 Chain Stainless Handcuff have key actuated lock along with double locking system which is actuated by means of a slot lock. Brushed stainless steel handcuffs, 2 keys included. Stainless steel for punishing saltwater or humid environments. The brushed stainless steel has a dull appearance relative to nickel plated cuffs. Wrist opening is 2.04 inch, weight 10.0 oz and distance between this cuffs is 2.00 inch.