The Leather Neck to Ankle Cuffs Combo all feature metal studs and are adjustable via metal buckle fastenings. The neck collar is adjustable up to a 19 inch circumference while the ankle restraints are adjustable up to 12.5 inches. These restraints are linked via a 44 inch long chain. The ankle cuffs link via a 2 inch diameter metal ring that links to the restraints with D-rings.