SmallRig CCC2271 is a custom and form-fitted cage designed to provide an all-around protection and mounting options for Canon 5D Mark III IV. It locks camera firmly via 1/4" screws at the bottom. And it protects camera from twisting and scratching. Attached Slotted screwdriver on the bottom of the cage provides convenience for you to lock and unlock camera. The cage maintains the battery door, ports and buttons of camera access. It features a nato rail on the left side which allows you to assemble and disassemble your setup quickly by using accessories with nato clamp such as Left Side Wooden Grip 2118. The cage provides multiple 1/4"-20, 3/8"-16, arri locating threaded holes and cold shoes for accessory attachment. Additionally, with built-in arca style compatible dovetail at the bottom of the cage, your setup could be switched fast between tripod and handle.