Quick discussion about drill bit sizing from Chapter 24 in the Modern Metalworking textbook. Drill bits are measured in four ways: Numbers, Letters, Inches & Fractions, and Metric. Watch the video, and if you have any questions you can email me.
Link for the Starret Drill Sizing chart: https://www.brokenbolt.com/images/starrett-inch-metric-tap-drill.pdf
