Review on ABN Hose Pincher Pliers Set: 3-Piece Automotive Crimping Pinch-Off Tool for Radiator, Coolant, Heater, and Fuel Pinch by Jesse Nell

A must when repairing a cooling system to stop coolant loss. Initially I had cheap plastic parts that you can buy at any tool store and I had constant problems with them chipping and just not blocking the coolant flow. I bought these metal models and I regret not having done so sooner. Works great, no coolant flows after installation and does not damage the hoses. Buy them if you are a mechanic