Don't buy it unless you want to over torque and destroy the valve core. I have used Steelman products in the past and liked their performance but not in this case. I've tried this tool to tighten multiple valve cores in the valve stems of different tire types and each time I felt like I was twisting and stripping the valve core A LOT. The tool should be torqued at 4 in-lbs, which is ideal as the setting torque for ISO standard yokes is 3-5 inches. I work at a facility that has a calibration lab