Digital Height Gauge
Accurately set router bit or table saw blade height
This tool is very useful for accurately setting the height of table saw blades or router bits. It also works well for setting the position of a fence relative to the table saw blade or router bit. I’ve been using one for about two years. It lets me setup a table saw or router more accurately than I could by eye. Normally one tries to make all identical cuts at one time on the same setup. However, if you miss a cut, or damage a work piece and need to make a new one, this height gauge will let you match your original setup very closely.
also has an extensive line of other digital height and positioning gauges for a wide variety of woodworking machines.