Use this gauge to offset and measure joinery clearances. With 35 leaves from .0015" to .035" in a brass holder, this gauge will stay put. Extend the leaves individually or combine them for larger than .035" offsets. It's ideal for measuring how far a piece you are marking from needs to be offset to put your mark in the waste. It's especially helpful if you are using a Kerf-Starter to create a kerf that will capture your saw and give your saw a clean, accurate start.