1 inch Breakaway complete - the cam twist gives you the assurance that your Breakaway will perform when you need it most. There is no other Breakaway that gives you the option of preventative testing while installed. With a twist the Breakaway can be taken apart and inspected for damage, corrosion, and wear without removing the Breakaway from service. There will no longer be the need to have a 'remove by' date on your Breakaway.