The PCRT-1 is constructed with durable 303 stainless steel and is the preferred method for removing and installing standard valve cores throughout the world. Simply put, the valve core gripper is an easier way to install and remove standard valve cores. Also, it eliminates the accidental dropping and subsequent loss of valve cores thanks to the patented gripping action at the tip of the tool. It works in four easy steps- Push it,Clip it, Release it, Twist it. It is designed for use on Bicycle, Automobile and Aviation Tires, Refrigeration and Air Conditioning Systems, Hydraulic Systems, preparing disposable propane tanks for recycling or any where there is a standard - Schrader® type valve core.