groove gages: inside diameter (ID) groove gages by Swissmann Gages. precision groove diameter gages, ID/OD gage & concentricity and roundness gages. Technical info on our groove gages is on our site.
Swissmann ENGINEERING,
Inc
Internal Groove Gages: Swissmann has developed and patented some of the world's most
preferred precision internal Groove Diameter inspection gages (for O-ring
grooves, snap ring grooves and most other types of internal grooves)
as well as Concentricity and Roundness inspection gages. All of them are
made in the USA
under the strictest controls.