Starrett® Micrometer Ball Attachment, For Use With: 224A, 224AA and 436 Series Micrometers, 0.27 in Anvil and Spindle Dia, 0.2 in Ball Dia
- 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, insuring positive contact with anvil and spindle
- The diameters, 0.200 or 5mm, of each ball used must be subtracted from the micrometer reading