The 12" combination square can be used as a level, depth gauge, and ruler, while the 7" rafter square can be used as a straight edge for marking and sawing. ✔ Mr. Pen 12" combination square is designed with a durable, rustproof stainless steel blade to last through tough job site conditions, while Mr. Pen 7" rafter square is made of heavy-gauge die-cast billet aluminum alloy construction that increases accuracy over laser-etched extruded stamped rafter squares.
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