Magnetic lumber scale set in thicknesses of 1/2", 5/8", 3/4". These Include the blade kerf of 1/8". For example, the 3/4" scale has the hash marks 7/8" apart, which gets you a 3/4" board every time! Speed up your manual SawMill with these lumber scales I manufacture out of my home. Using my magnetic lumber scales allows you to make repeatable cuts on a manual Mill much faster, the scale includes a blade kerf of 1/8", making it easy to make repeatable cuts of the same thickness. Scales are printed on UV/WEATHER RESISTANT sticker than placed on 1" wide magnetic strip. Approximately 24" long. Use for cutting fence boards, siding, trim, stickers and pallet boards whatever! I sell most of these to woodmizer owners but they will work for any Mill that uses a 1/8" blade kerf. How to use: 1.After cutting your cant, set a hash mark on the lumber scale even with the height of the cant. 2. Drop saw to next hash mark on the scale, make a cut. 3. after each cut you drop one hash mark and make another cut and repeat. It really takes all the math and brainpower out of a manual Mill in my opinion... So much simpler, faster, easier. Thanks for looking and if you have any questions be sure and get ahold of me. Happy sawing.