Top quality, heavy duty, steel and Steloy construction Steloy material makes the handcuff 40% lighter and 17% larger than standard cuffs 18 tooth, 3-retaining-bar system for uncompromising security Positive swing-through action Built-in backloading for fast cuffing Reinforced steel swivels for added strength and durability This chain style handcuff offers reinforced steel swivels for added strength and durability. The 3103-H Steloy is 40% lighter and 17% larger than standard cuffs. Constructed from a combination of aluminum and steel this lightweight model offers high strength without the extra weight.table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }