The ASP Edge Handcuff Key and Knife is the latest innovation in multi tools. The ASP Edge is a handcuff key, serrated knife, straight edge knife, screw driver and file. When closed this multi-tool measures just 2" across. Comes with a small key-ring for easy attachment. Comes in 4 finishes: Stainless, Aluminum (black) and Carbon Fiber (black & blue), and blue line.