XunW Ruler Steel Silver Woodworking Tools Measurement Work 2/3/4Inch Plastic Guards

Features: 1. Designed for precisions layout and measurement work. 2. Edge inspection using the optical gaps method. Blades are slanted on both sides with insulated handles. 3. Detect the flatness of plates leveling rulers machine tool work platforms guide rails and precisions workpieces. 4. Hold the blade edge perpendicular to the surface of the workpiece and check in the longitudinal transverse and diagonal directions. 5. During the inspection if the edge and plane of the workpiece are weak and uniform the flatness of the workpiece is acceptable; if the intensity of the incident light is different the plane of the workpiece is not uniform. A feeler gauge can be inserted at the edge of the blade and workpiece. The error of flatness can be determined according to the thickness of the feeler gauge. Specification: Material: Steel Plastic Guards Color: Silver Size: 75mm 100mm 125mm Weight: 140g 184g 195g Package Included: 1 x Square Ruler