PNC DSLR Camera GearBox GB-2 Video Accessory Cage comes W/ 15mm Rod The new gearbox can support a full size canon 5d mark ii inside of the cage without using the included extension adapters With the extension adapters installed, the gearbox can support the canon DSLR plus a quick release adapter, or larger camera bodies Metal bottom bracket has (5) 1/4-20 threaded mounts available underneath to attach a quick release plate The top black anodized metal bracket carries (14) 1/4-20 threaded holes and (9) 1/4" pass through holes