These button points have large convex discs (hardened, black oxide), useful for special applications of your dial indicators. These would be ideally suited for measuring hard, flat surfaces.
They will fit any brand of dial indicator as long as you select the proper thread size.
NUTS & BOLTS
Easy reading for anyone curious about the origins of mechanical engineering.
HOW WAS THAT BUILT?
From the Brooklyn Bridge to the Sapporo Dome in Japan.
"Perfect for browsing by young readers with an interest in engineering or architecture." - Wall Street Journal
STARRETT
An American Manufacturing Tradition