Shomer-Tec Clear Cuff Allows you to view what is really happening when a handcuff is being locked, unlocked, double-locked, etc. Fully functional handcuff that lets the student see and understand the inner mechanical workings of a handcuff Both the strengths and weaknesses inherent in all handcuffs become apparent Also a useful tool for learning unconventional handcuff opening methods, such as the shim pick Includes standard handcuff key