We recently acquired a pair of Titan handcuffs and listed them on eBay. These handcuffs are made with very thick steel and are some of the most heavy duty handcuffs ever made. 2 pairs of stainless steel and 9 pairs in black were made. This is one of the 2 pairs of stainless. The serial number is 0001.B. The other stainless pair is 0001.A and is viewable here.