This is a Jeniko brand bracket designed to hold a 10 or 15 pound nitrous bottle in a vehicle. Made from billet aircraft aluminum, these are high quality adjustable from 0 to 20 degrees in 5 degree increments to get the maximum performance from a nitrous system. The adjustable angle is engraved directly in the side of the base so there is no guessing on what angle the bottle is set to. Once the bottle is mounted to the ring/handle assembly it stays on. For bottle changes the ring handle assembly doubles as a handle for easy transpotation without scratching your bottle.