The CTS Thompson Model 9000 are larger than the standard handcuffs so that they can fit the legs of the subject with ease. NIJ approved. With CTS Trueswing Techonolgy it is assured that the bow will always swing straight and lock itself. These leg irons are made out of a stainless steel with nickel plating for extra visibility. Along with backloading for quickly using the cuffs and raised rivets for additional strength, you can rest easy with exceptional security. The inside perimeter of these leg irons opens anywhere between 8"-10.75" based on adjustment. Allowing for brief shuffling and zero chance of running, the chain is 15" long. These leg irons are relatively light, coming in at 19 oz (a little over a pound). 2 keys included. CTS Thompson Cuffs are made in the USA.