Question: what is the difference between standard and metric wrenches?
Answer: Standard wrench sizes are expressed in fractions of inches such as ¼,” ¾,” 1/2”, 9/16” inch and many more. ... Metric wrenches are measured using units of meters such as millimeters, centimeters and many more, for instance, 20mm, 6 mm, 8cm, etc. It will fit in bolts and nuts that are metric system.