For many modern hose connections, a hose clamp is a thing of the past. The ToolPRO A/C and Fuel Line Disconnect set is what youll need for modern push lock connections. These connectors feature a locking tab inside the fitting, where using your fingers or a screwdriver is not possible. To use this tool set, just select the piece that fits your hose or pipe; slip the opening in the tool over the hose or pipe; and press it into the connection. The connector will release; at which point it can be separated - and the disconnect tool removed. Sizes include 1/4, 5/16, 3/8, 1/2, 5/8, 3/4, and 7/8.