The Tormek AngleMaster has two functions. You can use it to set the jig to the grindstone so that it grinds your tool to any desired edge angle from 10° to 75° and you can use it to measure an existing edge angle on a tool.
2 magnets for convenient fixing onto the housing of the machine
The edge angle can be set from 10° to 75°
Designed to work on any grindstone diameter from 250 mm or 10" down to 150 mm or 6", allowing you to achieve an exact setting even as the stone wears.