Specifications: Material: Stainless Steel Accuracy: ±5° Suitable for: Angle measurement Drill Diameter Angle Gauge: 90mm/3.24inch Drill Bit Angle Gauge: 80mm/3.15inch Angle Gauge Overall Angle: 50mm/1.97inch Quantity: 3pcs Weight: 100g Package Includes: 1 x Drill Diameter Angle Gauge, 1 x Drill Bits Diameter Angle Gauge, 1 x Overall Angle Gauge 1 x Box 1, This angle gauge set is made of high quality stainless steel, high hardness and durable in use 2, Protractor diameter drill bit front edge 50 angle gauge 118° top of twist drill bits grinding gauge suitable for top diameter of 118°, no more than 50mm of grinding twist drill bits 3, Check the angle from the top of the drill bit (60°, 70°, 90°, 110°, 118°, 125°, 135°, 150°, 160°) 4. It is a practical angle gauge set for drill bits and drills. Drill bit sharpener inspection 5. The cutting tool angle is 60 degrees for a 55 degree tooth-shaped angle. and metric thread, inch thread inspection, knife and special measuring tools for measuring angles