Remove and install valve core in the charged system,R410A R22 systems included Replace Leaking valve cores quickly and easily Work on service Schrader 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 Forged Brass/Steel construction designed solid and to last Features: Suitable for the crowd: or professionals and do-it-your-self handy men alikeAbout this item 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-slip design; The schrader's core grabber tool make it be easily 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 schrader cap, schrader's core grabber tool, built-in magnet at the bottom base. Color: gold Material: copper Length: 117mm Note: Please close the valve and disconnect the air conditioner before removing the valve core. Package Contents: 1 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 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.