Description: Accurate and convenient measurement of narrow or concave objects, and the dial indicator is difficult to measure the inner diameter size. The clutch's structure is used to realize the automatic rotation of measuring direction. A dovetail seat for installing indicators on the top, rear or front part. It is durable, accurate, sensitive and responsive.0-0.8mm measurement range, 0.0005 "/ 0.01mm scale, 0-40-0 balance inch. Magnetic pointer and contact pin can be used reliably in magnetic environment. The probe rotates 180 degrees, freely adjusting the direction of measurement and the left and right swinging probe. The knurling bezel rotates 360 degrees at any position to make the reading zero. Specification: Material: Metal Size: Approx 81*19MM Contact point length: About 1.5 cm/0.59" Dial type and reading: 0-40-0 balance, inch and 0-25-0 equilibrium index reading Scope: 0-0.8mm Resolution: 0.01mm Package Includes: 1 Piece Lever Dial Test Meter Gage Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Please check the size measurement and the picture carefully before making payment. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand,Thank you