Features: Ensures safety and efficiency of your HVAC systems with our Locking Hat Key, specifically designs for secure installation and removal of Refrigerants locking Hat for HVAC 410A and R22 systems. Craft from brass materials, this HVAC Multiuse Key Tool offer ergonomic grips designs, making it easy to handle and store in any HVAC tool bag. For both professional HVAC technicians and enthusiasts, this tool simplifies process of maintaining air conditioning systems by providing solution for refrigerants Hat management. For use in both residential and commercial air conditioning maintenance, this tamper resistant key tool help prevent refrigerants leakage and ensures systems performances. With its keyrings, this convenient multiple key tool is easy to carry, ensuring you have access whenever need for efficient HVAC service and repair tasks. Specifications: Component: Brass Color: As Picture Show Size: 4.6x2.3cm/1.81x0.91inch Package Includes: 1pc Locking Hat Key Set note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.