All ATI / Brencor Countersink-Chek Countersink Gages are on sale at Gaging.com! 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.