Gauge block AB series

Provides a quick, accurate & direct means for setting or checking angles. Eliminates calculations to help avoid errors. Blocks are furnished in 1° increments to 5°, then in 5° increments to 30°. With the addition of the optional 1/4°and 1/2° blocks nearly any angle can be set in 1/4° increments. 3" long by 1/4" thick hardened steel. Precision ground to ±0.0001" per inch (equates to 21 seconds at 1° & 16 seconds at 30°). Sets furnished in fitted wooden case. Individual replacement blocks available.