Our 2.5 lb Handheld Fire Extinguisher (Part No. 2081) includes a mounting bracket, but you can replace a lost or damaged bracket with this quick-release unit. All-metal construction (similar to the original bracket) is approved by the SCCA for cars that do not require a plumbed-in system. The bracket is designed to be bolted to a panel or hose-clamped to a roll bar. Fits most handheld extinguishers measuring 3" to 3.2" diameter.