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 stainless steel• Heat-treated internal lockworks• Smooth ratchets for swift cuffing• Double lock is a slot lock• Includes two keys• Lifetime Warranty SKU 350105Material: Stainless SteelFinish: Satin Stainless FinishWrist 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: 23Distance Between Cuffs: 2.00˝ (5.1 cm)Maximum Overall Length: 8.98˝ (22.8 cm)UPC: 022188501056