Caliper & Height Gage Checker from Fowler Fowler's setting masters are quick, easy and extremely accurate. Each comes with a certificate of calibration and a wood case. Save time and money by calibrating your own measuring tools. Caliper / Height Gage Checker features include... Horizontal and vertical use Used for the calibration of height gages and calipers Scale on one side reads: 0.5", 2", 4", 6", 8", 10" and 12" for inside caliper measurements, 1", 2", 4", 6", 8", 10" and 12" for outside caliper measurements Scale on other side reads: 1", 2", 4", 6", 8", 10" and 12" for height gage checking Accuracy: å±.0002" Note: Larger size and metric versions available on special order