ASP folding rigid handcuffs may be used to control the most resistive subject. Their extension lock design provides a secure structure that allows an officer to stabilize without impact. The folding mechanism allows to restraint to be easily carried and automatically locked open to form a solid restraint. The rigid design incorporates a one piece unitized stainless steel frame, polymer over-mold, dual keyway, high visibility double lock indicator, increased range of adjustment for both large and small wrists, smooth bow action, and single direction unlock. Includes a free nylon handcuff strap!