FOTGA DP500 II DSLR Quick Release 15mm Rod Rail Support for Follow Focus Arca PU60 and Mattebox This Fotga DP500 II quick-release is a upgraded version for the first DP500 generation. It becomes much more appliable and usable This 15mm rod rail camera support is made of metal,very sturdy for your heavy cameras. Besides,it is consisting of a quick-release plate which makes it easily to attach or detach the device What's more,it's special design make it comaptible with Arca series and PU60 quick-plate. It is composed of 2 height riser, a sliding rail block and two 15mm rods This Rail System has a central Tripod Mounting plate that makes a perfect balance between the camera and the front mount accessories (35mm Adapter/Mattebox/Follow Focus) This rail system also has built-in Lens Support which is very useful accessory to support any lens. This Rail System is strong enough and it can support the large variety of smaller cameras and bigger cameras as well