The Groz Depth Gauge with Protractor with a Rectangular head combines the functionality of both a depth gauge and a protractor. This tool is made from a high quality stainless steel to be durable, enabling long usage for individuals such as machinists, draftsmen, and mechanics. The protractor head features deep-etched graduations from 0 to 180 degrees in opposite directions for quick and accurate angle readings. Graduated in both imperial and metric units, the 6 inch (150 mm) steel ruler can be used lengthwise to measure depth and can be locked at any desired angle by the knurled thumb nut.