Monster Mills Feeler Gauge

A blade type feeler gauge is the correct tool to set the gap on your Monster Mill. To save you time and money over traveling to the auto parts store to get a feeler gauge, we are now offering this model with 26 blades of calibrated thickness in thousandths of an inch. Making sure your gap is set correctly is important for a consistent crush, and this tool is what you need to make that happen. Select two blades that combine to set the gap you want. We recommend starting gaps between 0.040 and 0.045 for all of our mills.