The main size of the refrigerant locks the key is about 2.5 cm /0.98 inch long, which is made of high -quality iron. It is solid and , reliable, not easy to deform or damaged, and long -term performance. Our lock keys are compatible with R410A, R22 and general refrigerant safety caps.Please confirm the compatible model before buying. You receive 2 HVAC refrigerant keys, one is 2 key interfaces, and the other is 3 key interfaces. This is essential for HVAC technicians and service professionals. These HVAC locking keys have multiple key interfaces, which can contact various lock mechanisms to provide comprehensive solutions for different HVAC systems, while preventing unauthorized access and enhancing security. The compact design of the HVAC refrigeration key is convenient for stored on the tool kit or key chain, simplifying the installation and disassembly of the lock cover during the service call.It is very suitable for residential, commercial and industrial HVAC units or any HVAC maintenance or maintenance tasks., Manufacturer: Akfldms