Features Center Finder: Used to mark the center of the circular plate and shaft, which greatly facilitates the measurement. High Accuracy This center search gauge ensures high accuracy and greatly improves your work efficiency. Measuring range: With a 100mm scale on the body and standard 45° and 90°, the ruler has a wide measuring range. Good Material The use of high quality aluminum alloy material, which is not easy to deform and provides long service life. EASY TO CARRY The center measuring tool is lightweight and compact, making it very convenient for daily carrying. Specification: Item Type:Center Gauge Material: aluminium alloy. Measuring range: approx. 100 mm / 3.94 inches. Minimum scale: 1 mm. Use: for woodworking measurements. Function: draw the center line of a circle, find the center of a circle, draw a 45° line and draw a vertical line. Package list: 1 x centre display Package List 1 x Center Gauge