How Offset Paths Work

Miter Limit:
“The miter limit controls when the program switches from a mitered (pointed) join to a beveled (squared-off) join. The default miter limit is 10, which means that when the length of the point reaches ten times the stroke weight, the program switches from a miter join to a bevel join. A miter limit of 1 results in a bevel join.”


SOURCE:
https://design.tutsplus.com/tutorials/comparing-the-two-methods-for-creating-line-icons-offset-paths-vs-strokes--cms-25134