From Manufacturer
The black SpiderPro Single Camera System and SpiderPro Hand Strap from Spider Camera Holster are being sold here as a B&H Kit. The SpiderPro Single Camera System includes a belt, holster, camera plate and pin. Using this system, you can also remain hands-free while your DSLR hangs at your side waiting for that grab shot. The system is comprised of four pieces. The SpiderPro belt, which holds the entire rig, the holster that holds the camera, the plate that attaches to the tripod socket of your camera and the pin that is attached to the plate. The entire assembly slides into the holster which secures to the belt using Spider's two-position lock system. Your camera stays at your side while retaining complete freedom of movement.
The black SpiderPro Hand Strap is designed to work with your DSLR camera and lens with or without a vertical grip. Because the bottom of the strap mounts between your camera and any tripod plate, it won't interfere with the tripod mounting, so you can leave it attached to your camera. The top of the SpiderPro strap is attached by threading it to your camera's upper strap lug. Both the bottom and top of the strap can be easily adjusted to the size of your hand.