All ATI / Brencor Countersink-Chek Countersink Gages are on sale at ! These high quality, "Made in the USA" products are "1 rev", direct reading gages that accurately measure the major diameter of countersink bores. Full-round, exact angle, conical gaging plunger gives readings directly in .002” (.05mm) diameter increments. Available in 82°, 90°, 100°, 110°, 120°, and 130° countersinks and supplied with a setting gage. Optional digital or metric indicator available.