The Model 705 is designed specifically for larger individuals. It has a 3.25 inch opening with a maximum inside perimeter 20% larger then the Model 703 Leg Iron. The Model 705 is made to the same standards as other Peerless products. It features all steel construction, spun rivets and a rust resistant nickel finish. The 15 inch chain effectively limits range of motion. Lifetime warranty for manufacture defects and two keys supplied. 22 locking positions