Product description: Material: stainless steel. Accuracy: 5. Suitable for: angle measurement. Drilling diameter: 90 mm. Drill angle gauge: 80 mm. General angle gauge: 48mm. Quantity: 3 pieces. Weight: 100 g. Contents: 1 drill diameter angle gauge. 1 drill angle gauge. 1 General Angle Gauge. This set of angle gauges is made of high quality stainless steel, high hardness and durable Gauge protractor front edge diameter 50, 118 angle, suitable for 118 diameter, no more than 50mm Check drill bit angle (60, 70, 90, 110, 118, 125 , 135, 150, 160) It is a handy angle gauge in drill bits, angle measurement and drill bit sharpening < p>Cutting tool angle is 60 degrees for 55 degree tooth-shaped angle and metric thread, inch thread inspection, blade and special measuring tools for measuring angles< /p>