Professional Quality Precision Measuring Tool

Measure dimensions from inside of holes to outside edges. The spherical anvil or spindle contacts the inside curved surface at a single point, permitting accurate gaging of wall thickness to 0.0001".

The back side of the anvil stem of the Ball-Anvil Tube Micrometers is cut away, making it slim enough to insert into small parts such as sleeves, collars, tubing and other cylindrical workpieces to measure wall thickness.

Features:

• Microfine graduations on satin chrome.
• Anvil and spindle hardened and ground; spindle thread hardened, ground and lapped.
• A wrench is included for quick and easy zero adjustment on sleeve.
• Ratchet stop thimble for exact readings.
• Accuracy: 0.0001".
• Meets or exceeds Federal accuracy specs.
• Includes fitted case.