SmallRig Dual 15mm Rod Clamp 1943 features 60mm standard center distance. It can be attached to the cage or any plate with 1/4'' threaded holes. It could also lock 15mm rods, which are tightened via 2 locking levers. Thus, it provides a secure platform to attach accessories, such as lens support, matte box, battery plate and so on to 15mm LWS rig. Moreover, 15mm rods mounted on it will not touch and cause the camera body some scratches because of the special design at the end. Two 1/4"threaded holes on the top could be mounted with Singal 15mm Rail Clamp 1549 to form a triple 15mm rod clamp for more DIY choices.It is exclusively designed for 15mm rods. It offers the rods more DIY possibilities.