Stainless steel Precision roller bearing pivot Forged steel bow Sentry Handcuffs feature I-beam inspired, rigid frames made of corrosion-resistant stainless steel with a beautiful and unique bead-blasted finish. The dimensional profile of the double bars provides strength without excessive bulk. This, combined with a precision roller bearing pivot and forged steel bow, yields a hitch-free, smooth swing. Unlike traditional stamped steel cuffs, the frame and bow are manufactured to eliminate sharp edges and rough surfaces. This reduces the risk of subject discomfort or injury. These cuffs also feature dual-sided keyways and double lock slots, to speed application and removal. The forged heat treated steel bows have flat contact areas, so they apply more precisely and safely.