From the Loftsmith community

R90 radius gauge

For checking a rounded edge against a known curve, without guessing by eye. Hold the thin curved strip up to the edge and look for light between them. It has the radius stamped on it and a small hole to hang it from a hook. Change the radius to gauge a different curve.

1 part · 6 g · 85 × 54 × 3 mm

Sby Sully