Framing Square Stair Gauge Pair
A pair of 28 mm stair gauge knobs that clamp onto the edge of any steel or aluminium framing square. Each has a 5 mm slot that takes blades up to about 4.5 mm thick, plus an M5 thumb screw and a drop-in captive M5 nut. Set one gauge at the rise and one at the run, and every stringer notch, rafter seat or repeated angle transfers identically. They print as two knobs joined by a snap-off sprue bar.
tool stair-gauge framing-square carpentry