Ratchet stop no lock nut. These micrometers reach over the edge of sheet metal and take measurements away from the edge toward the center. Also for other gaging jobs where a deep throat micrometer is needed. Rounded anvil on 1" (25mm) size gives a point contact for more accurate gaging; flat anvil also available. 1/2" (13mm) micrometers have Satin Chrome Finish; 1" micrometer frames have black wrinkle finish.
