This engineer's square set contains the four sizes you need most often - 2", 3", 4" and 6". These all-steel, precision squares are perfect for setting up table saw blades and fences, jointer fences, drill press tables, and other machine tools where accuracy is a must.They are superb for marking out wooden joints, checking cut stock, or checking the accuracy of your other shop squares. All surfaces and edges are ground for straightness and parallelism. Squares are accurate on both inside and outside edges. No graduations appear on the blades. Fitted storage case for added protection.