Digital spherical face micrometer, ratchet thimble for constant force, carbide measuring faces, ratchet stop for constant force. Spherical anvil micrometers are especially useful in measuring the wall thickness of small parts such as sleeves, collars, tubings and various cylinderical workpieces. They are used to measure dimensions from the inside holes to outside edges. The spherical anvil contacts the inside curved surface providing a single point contact and permitting accurate gaging of the w
