The XTENDER® (X-DFRC-20-1) Double 15mm Rod Clamp gives you the option to attach any XTENDER® arm or 1/4"-20 camera accessory to your 15mm rod system. There are three 1/4-20" mounting locations with set screws to lock your accessory into place: two on top and one on the bottom. With the addition of a (X-CSR-10) Shoe Adapter, you can convert each location to a shoe mount to give you even more quick release mounting options.