SMALLRIG Dual 15mm Rod Clamp 1943 features a standard center distance of 60mm. It can be attached to the cage or any plate with 1/4" threads. This provides you a secure platform for attaching accessories to your 15mm LWS rig, such as lens support, mattebox, battery plate and so on. Moreover, it's worth mentioning that 15mm rods will not damage your camera body because of the incompletely penetrable rod hole ends. The dual locking levers ensure a secure fit.