Mastercool universal valve core spanner set 91498 – For 1/4" & 5/16" SAE The Universal valve core spanner set 91498 from Mastercool is an indispensable tool for all refrigeration and air conditioning technicians. With this high-quality Schrader valve tool, leaking or damaged valve cores can be removed and replaced quickly and safely under system pressure - without any loss of refrigerant. Product description: The tool is simply screwed onto the existing Schrader valve. The valve insert is loosened using the integrated valve driver and then pulled out safely using the magnetic tip. Thanks to the integrated shut-off screw, the system remains tight throughout the entire process.In addition, the valve core can also be removed as a precautionary measure to significantly speed up the evacuation and filling process. Removing the valves prevents unnecessary restrictions in the cooling circuit and saves valuable working time. Advantages at a glance: Removal and replacement of valve inserts during ongoing system operation Significantly reduces evacuation and filling times Prevents refrigerant losses Robust and precise processing for long-term use Compatible with 1/4" and 5/16" SAE connections (adapter included) Technical data: Type: Schrader valve changer Connection: 1/4" SAE & 5/16" SAE (each with adapter) Material: High-quality metal alloy Use: For maintenance, repair and acceleration of filling processes Coolant - suitable for high-pressure systems e.g. R410a   Scope of delivery: 1x Universal valve core spanner set 1x adapter 1/4" SAE 1x adapter 5/16" SAE With the Mastercool 91498 valve core changer you not only save time, but also money – and at the same time ensure professional results with every maintenance.