Quality Alvin graduated clear plastic T-squares feature both inch and metric calibrations. Made of tough, crystal-clear Dunilon. Available in 3 blade lengths: 12" T-square has two bevels, 18 and 24" T-squares both have double inking edge. Easy to see through to underline notes, draw columns, or check the layout of your paperwork.
Alvin P-Series clear acrylic drafting T-squares are plain, ungraduated, and provide a full view provided 100% acrylic blade. Relieved edge prevents ink from under-flowing onto drawing. Great for quilting, sewing, drawing, crafts, and more.