Not sure if you’ve sharpened your tools or drill bits to the perfect angle? This universal grinding gauge from Silverline Tools will help you check.
Made from heavy-duty 14ga stainless steel, the grinding gauge can check 55°, 60°, 90°, and 120° internal and 60°, 90°, and 120° external angles. Silverline manufactures their tools for the UK so the etched graduations read in metric.
Five bucks will buy you this gauge at Jack’s Tool Shed.