The most adjustable medallion holder you've ever seen. Eight different cam action bar placements and two 360-degree rotary cam positions. Precision and firm clamping made with swinging cam arm. Low profile-all components only .56" high. Holds just about any shape object from just less than the size of a dime to just over 3-1/2" diameter. If you have more specific needs, please ask. The holder may also be customized to your exact specifications.