FIXKIT RSI Tri Square 90 Degrees Right Angle Ruler 10 Inch and Measuring Tape 5 Meter Tri-Square  (Pack of 2)

Try Square features a rust-proof, stainless-steel blade and a CAST handle for long life. These squares are precision-etched with black scales for easy reading and are used as measurement tools and for marking 90° angles. try square is used mostly for Laying out lines perpendicular to an edge or side of a board or Checking edges and ends of boards to see if they are square with adjoining surfaces or Checking the width or thickness of narrow boards or Measuring short distances or checking flatness.