S&W 300 Hinged Blued Handcuffs have key actuated lock along with double locking system which is actuated by means of a slot lock. Wrist opening is 2.04 inch, weight 10.0 oz and distance between this cuffs is 2.00 inch.
 
S&W 300 STD HINGED BLUE Cuff Hancuffs have key actuated lock along with double locking system which is actuated by means of a slot lock. Wrist opening is 2.04 inch, weight 10.0 oz and distance between ths cuffs is 2.00 inch.