This is a Hobby and Craft Ruler from Midwest Products.
The perfect ruler for all types of measuring needs. A must for anyone who works with wood white plastic ruler.
One side is a standard 8 in. ruler The other side has ¾ in., 1 in. and 1½ in. markings, along with graduated measuring notches from 1/64 in. to ½ in. One end has round measuring holes from 1/16 in. to ¼ in.