Quarter Scale Magnetic Ruler for mills, measures up to 48″. 4, 5, 6, and 8 quarters with imperial scale. Fits Hunter, Sawyer, Patriot, Warrior, HFE-21, HFE-30, HFE-36, Oscar-428, Oscar-330, Oscar-336, FarmBoss, H360, fits older Hud-Son mills too and could be used universally on others.

Calibrated for 1/16 kerf allowance. A saw’s kerf is crucial for making accurate cuts.