Adjustable T-Square for improving cutting of drywall, OSB and plywood
Photo: Mark Weiss
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Adjustable T-Square

Improving on the old 4-foot squares that could only mark 90-degree cuts in drywall, OSB, plywood, and other sheet goods, this adjustable square has markings for 30, 45, and 90 degrees. Or you can set it to any angle between 0 and 180 degrees. Folds for easy transport. About $40, Johnson Level
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