I have been using two of these levels to build and install wood frames for about 6 months. Our typical week tends to be tool-heavy as we are constantly on the move and have many tools for our high-end joinery applications. I always carry a few essentials in my pockets or bags: a sharp pencil, a marker, a tape measure, and THIS LEVEL! All angles are fairly common and read to within 1/128th. Works better as a ruler than any speed square as the 9 inch format gives a little more room to work. I only gave 4 stars because the ends are a bit tapered.
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