This Angle gauge set is made of high quality stainless steel, high hardness, and durable in use
Cutting tool angle is 60 degrees for a tooth-shaped angle 55 degree angle and metric thread, inch thread inspection, blade and special measuring tools for measuring angles
Diameter drill front edge of the protractor 50 gauge 118 degree apex angle of twist drills grinding gauge suitable for 118 degree apex diameter of not more than 50mm of grinding twist drills