Most mitre gauges that come with a table saw suffer from three major problems. First, the support surface for the workpiece is usually very limited. Second, often the bar doesn’t fit the table slot overly well. Third, the angle scale is usually not very accurate. Most mitre gauges can be set square with some effort and the use of a separate square, but a good mitre gauge should not take effort to make square and should not need the use of an additional tool. The overall accuracy is usually affected by all three of these problems, leaving the user with something less than usable. JessEm has addressed these three problems and more with their new mitre gauge.