Special Features:

Gage, angle block, granite; matl gray or dark gray fine grain granite; dimensions 18 in. Long, 36 in. High by 24 in. Wide, top surface of angle block not less than 6 in. In depth block is a 90 deg. W/air lift; tolerance ground square to within 0.000025 in. Full indicator reading in a 6 in. Length, ground faces includes base, front, top and 2 side surface, flatness not to exceed 0.000025 in. Full indicator reading in a 6 in. Length; air lift provides a 0.002 in. Cushion of air under the block w/a min. Air pressure permitting the block to be moved easily; block has a 12 threaded inserts, 3/8-nc16 thread on the front vertical surface, the threaded inserts are 2 in. Deep

Properties:

One or more blades (leaves) of tempered steel ground to and marked with their respective angles. It is used for checking angles, as in forgings, castings and machine work.