Same as the 85 51 250 A but with a locking device which enables simple and secure work on clamps under tension without effort Lock the tool on the clamp and move it out of the way while you are working Tool keeps the clamp engaged for easy movement Can be used on a variety of clamps up to 2 ¾" diameter Opens at a touch of a button APPLICATION AREAS CARS/TRUCKS: Air suction, cooling, charge air, water return, thermostat, fuel, heating