NOVA 10051 Complete Workshop 10 in 1 Gauge is an accessory for NOVA Chucks and the general workshop. This handy gauge is exclusive to the NOVA Chuck range. Quickly and easily work out your dovetails accurately. If you use a chuck, this is an essential accessory. In addition, this useful gauge also comes with a variety of common measurement and gauging functions used in the wider workshop：angle checker for knives, carving tools, planer blades, diameter gauge, center finder, dowel gauge, furniture angle gauge, and ruler.