The Starrett 222 Sheet Metal Micrometer reaches over the edge of sheet metal and takes 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 is also available. The 1/2" and 13mm micrometers have satin chrome frames; 1" and 25mm micrometer frames have black wrinkle finish. 1", .001" Grad, Round Anvil, Carbide Anvil & Spindle, Ratchet Stop finish.