Remove and install valve core in the system,R410A R22 systems included Replace Leaking valve cores quickly and Work on service valve cores of booth 1/4 inch and 5/16 inch service ports Durable, solid brass tool has a ball valve that can be opened or closed in just a quart-turn Solid Brass/Steel construction designed solid and to last Suitable for the crowd: for and do-it-your-self handy men alike Work with: easy connect with 1/4 or 5/16 R22 or R410a systems yes, dual size Great function: The valve core remover installer tool is made of pure copper; The metal knob is all designed with anti- design; The core tool be inserted into the inner valve core to control the core. No need to stop the machine, no need to release the refrigerant, the dual size 1/4&5/16 can adapt to R22/R134/R410/R32 Rair-condition, external bypass port design can remover valve cores. Ball value handle, metal cap, core tool, built-in magnet at the bottom base. Note:Please close the valve and disconnect the air conditioner before removing the valve core. Colour:Gold Material:copper Size:Length:117mm Package Contents: 2 set * 1/4 inch & 5/16 inch SAE Valve Core remover and install tool Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.