Aluminum alloy material, T-Square frame is deep and sturdy
locking into place easily and won't budge out of place.
Large, adjustable tensioning knob locks securely to allow angled measurements
Angle markings 90°, 75°, 60°, 45°, 30° when measuring and you also can use it as a straight ruler
3 IN 1 toolset
1pc T-shaped square ruler, 1pc Pencil, 1pc sanding paper
Perfect for architects, engineers and artists, or DIY at home