The Cross Fire is a unique kit as it is the Single Action kit and Striker kit combined. It comes with all block rods. The Cross Fire uses the expandable DSLR baseplate so this kit can easily be upgraded from a simple point of contact kit like the Striker Kit to a full shoulder mounted system like the Fast Draw. This kit works on any DSLR camera with or without battery grips as it is infinitely adjustable in height. The baseplate attaches to your tripod plate using the standard tripod plate screws, (2) ¼ 20 and (1) 3/8 16. Your camera can also be quickly released from the rig by turning the red knob then pulling up on your camera. The camera quick release plate stays mounted to your camera so you can quickly switch between using the camera as part of a rig or on its own. You can easily add the optional Z-Finder Pro, DSLR optical viewfinder, by attaching the Z-Finder Mounting Frame (included with the Z-Finder Pro) to the camera quick release plate using two thumb screws.