Direct radius gauge without calculation

While Caliper measure diameter - with this tool you can directly measure the radius without any additional calculation as you need for other radius gauges.

The value you read is the radius!

 you can use  a  caliper(16mm) or a meterstick (16.2mm) or for rough estimates a 5mm scale is on the device arms.

If it doesn't fit you can just scale this (the 5mm scale on the device can't be used then)

-works on circles where over >120° of the circle could be measured (60° corner) - doesn't work on 90° corner radius.

right and obtuse angles

For 90° or obtuse angles (up to 130° corner) use the 3× or for larger diameter the ×10 variant (due to precision these are only for caliper)