These nickel plated, steel construction (AISI 1050 ASTM A682.73), NIJ Standard 0307.01-approved set of handcuffs has 23 locking positions, uses a push pin double locking mechanism, and are joined by two heat-treated steel connecting links which swivel. The inside measurements of the handcuffs are between 5.75” and extend through 8” to 8.4”. Tightest inside width is 1.8” and affords a wrist opening of 2.04”. Cuffs weigh 10 ounces. Two keys are included with each set of cuffs. The handcuffs are made in Houlton, Maine, USA. Warranty: Smith and Wesson handcuffs are warranted from defects in material or workmanship, excluding abuse or ordinary wear and tear, and will be repaired or replaced at no charge. Warranty does not cover defects or malfunctions from careless handling, unauthorized adjustments or modifications or damage to finish from ordinary wear and tear or careless handling.