The Starrett 78Mxt Bore Gage Features A 3-Point Contact, 225-250Mm Range, 118Mm Measuring Depth, And 0.008Mm Accuracy. 225-250Mm Range, W/3 Point Contact.

• Wide measurement range without changing anvils
• Tungsten carbide measuring faces on all 3-point heads above 1/2" (12.5mm)
• Ratchet stop ensures consistent measurements
• Self-centering contacts for true readings
• Blind bore measuring capability above 1/2" (12.5mm) diameter
• Extensions available up to 6" (150mm) for deep hole measuring
• Setting rings included
• Depth stop/collar also available for .080"-.250" (1-6mm) range
• Each micrometer bore gage is furnished in a case, complete with setting ring, contacts, wrenches, and instructions