/ Precision Measuring Tools / Precision Hand Tools / Micrometers / Micrometer Accessories / 247MD * Not actual product image 56691 247MD Micrometer Ball Attachment, 5mm Diameter Balls 56691 Other similar products For 216M and 436.1M Micrometers, 6.35mm diameter Anvil and Spindle 6.35mm Diameter Anvils. Features Specifications Contact Starrett Features Easily applied by snapping on to end of either anvil or spindle, thus permitting two attachments to be used together Balls are hardened, measure 5mm in diameter, and move freely in the retainer, insuring positive contact with anvil and spindle Diameter: 5mm ( .200") For 216M and 436.1M Micrometers, 6.35mm diameter Anvil and Spindle Specifications : Diameter: .200" (5mm) Fits Starrett Series: For 216M and 436.1M Micrometers, 6.35mm diameter Anvil and Spindle