SPI Digital Countersink Gage The precision instruments are specifically designed to measure the top (major) countersink diameter in .002” increments. Gives fast, accurate and repeatable readings on the shop floor or in the gage room. Virtually fool-proof, even the inexperienced can use the countersink gage with reliable results. Specifications include… 0.160” – 0.360” Measuring Range 100° Countersink Angle Features include… Easy to use, right out of the box. Direct Reading Self-zeroing and does not require a separate setting device SPC Output