New from ASP. Blue line hinged handcuffs! Hinged handcuffs are more restrictive than chain link cuffs. The new ASP Ultra Handcuffs are the most advanced cuffs on the market. Featuring lightweight construction, smooth edges, and conical bows. These are the only handcuffs on the market that have keyholes & double locking slots on both sides of the cheek plate. ASP handcuffs no longer utilize a polymer overmold. The whole handcuff is constructed of steel and forged aluminum, making them superior. The blue line handcuff is all black, with a blue strip on each cuff.