Description: Diameter drill front edge of the protractor 50 gauge 118 degrees apex angle of twist drills grinding Gauge suitable for 118 degrees apex diameter of not more than 50mm of grinding twist drills Check the drill apex angle (60, 70, 90, 110, 118, 125, 135, 150, 160 degrees) Cutting tool angle is 60 degrees for a tooth-shaped angle 55 degrees angle and metric thread inch thread inspection, and measuring the angle of special measuring tools Specification: Material: Stainless steel Size: Drill diameter angle Gauge: Approx. 80.8mm/ 3.18 inch Drill bits angle gauge?Approx.80mm/ 3.15 inch General angle gauge: Approx.50mm/ 1.97 inch Suitable for angle measurement Package Includes: 1 Piece of Drill Diameter Angle Gauge 1 Piece of Drill Bits Angle Gauge 1 Piece of General Angle Gauge