L.S. Starrett Micrometer Ball Attachments
247D BALL ATTACHMENT FOR
Product Description
- Easily applied by snapping on to end of either anvil or spindle, thus permitting two attachments to be used together
- Balls are hardened and move freely in the retainer, ensuring positive contact with anvil and spindle
- The diameters of each ball used must be subtracted from the micrometer reading