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150 mm Metric Rafter Speed Square
A 150 mm metric speed (rafter) square. The 12 mm lip hooks over a board edge so you can mark square cuts. It has engraved degree ticks every 5° swinging from the pivot corner, a mm scale every 10 mm, and 3 mm scribe holes 20–120 mm in from the fence for drawing parallel lines with a pencil or scribe. The open-frame triangle keeps it to about 43 cm³ and prints flat with no supports.
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