Meets Professional Police Grade standards and specs, heavy-duty stainless steel, double-locking mechanism, 20 locking positions, (2) keys included. The UZI-HC-PRO-B Professional Stainless Steel Double-Lock Handcuffs Professional Police Grade standards and specs with a stainless steel construction, double-locking mechanism and (20) locking positions. (2) keys included. Comes in black. UZI combines advanced technical concepts with innovative designs to produce products used and trusted by the Army, Secret Service and Special Forces. Since its launch in the 1950s, UZI has become one of the world's most famous firearm brands and a 20th century icon.