The Cal-Van Tools Heater Hose Disconnect Tools, No. 244TNZ, are designed to completely fill the void in the connector to release the fastener. There is also a 40-degree offset designed to help users work around obstructions in tight spaces, which is especially important in vans and pickup trucks where space is tight. Tools are made of aircraft-grade aluminum and conveniently sold as a set with all four sizes: Ford, GM, large and extra-large.