These Foot and Handcuffs are a simple but extremely effective form of restraint. Both cuffs come with completely adjustable metal buckle fastenings. The ankle cuffs are adjustable up to a 12 inch circumference. The wrist cuffs are adjustable up to a circumference of 10.5 inches. Both restraints contain D-rings which then attach to a 1.75 inch diameter rigid metal ring. The 17.5 inch long sturdy metal chain is attached to both metal rings.