.200" Micrometer Ball Attachment, .200" Diameter, For 224B through J, 238, 239, 436 and 663, .300" diameter Anvil / Spindle
Balls are hardened, measure .200" in diameter, and move freely in the retainer, insuring positive contact with anvil and spindle
Easily applied by snapping on to end of either anvil or spindle, thus permitting two attachments to be used together