Smith & Wesson Model 300P Hinged Handcuffs with Push Pin Lock-Nickel FinishSmith & Wesson model 300P push-pin double lock hinged satin nickel finish handcuffs, 2 keys included. Double hinged design to further restrict movement for special applications. Has push-pin double lock for increased security. They are difficult to escape from even if the subject has the key. The inner perimeter of these handcuffs measures 5-3/4" to 8" with 20 locking positions. Shown in the inset is the push-pin on the model 300P. Push-pin model handcuffs are easier to double lock, especially in dark conditions. Includes Smith & Wesson's lifetime warranty and instructions. Weigh 11 oz.