All Smith & Wesson handcuffs meet the NIJ requirement pertaining to strength.Smith & Wesson handcuffs are proudly made in Houlton, ME, U.S.A.• Body of Handcuffs is Crafted From Carbon Steel• Heat-treated Internal Lockworks• Smooth Ratchets for Swift Cuffing• Double Lock is a Slot Lock• Includes Two Keys• Lifetime Warranty MATERIAL Carbon Steel FINISH Nickel Finish WRIST OPENING - First Notch 2.04˝ (5.2 cm) INSIDE PERIMETER - First Notch 8.40˝ (21.3 cm) INSIDE PERIMETER - Last Notch 5.80˝ (14.7 cm) INSIDE PERIMETER - Tightest 1.80˝ (4.6 cm) WEIGHT 11.2 oz (317.5 g) NUMBER OF LOCKING POSITIONS 23 DISTANCE BETWEEN CUFFS 2.00˝ (5.1 cm) MAXIMUM OVERALL LENGTH 8.98˝ (22.8 cm) MATERIAL Carbon Steel FINISH Armornite® Finish WRIST OPENING - First Notch 2.04˝ (5.2 cm) INSIDE PERIMETER - First Notch 8.40˝ (21.3 cm) INSIDE PERIMETER - Last Notch 5.80˝ (14.7 cm) INSIDE PERIMETER - Tightest 1.80˝ (4.6 cm) WEIGHT 11.4 oz (323.2 g) NUMBER OF LOCKING POSITIONS 23 DISTANCE BETWEEN CUFFS 2.00˝ (5.1 cm) MAXIMUM OVERALL LENGTH 8.98˝ (22.8 cm)