Mr. Pen 12" combination square is a multipurpose measurement instrument, ideal for ensuring precision and accuracy in woodworking, metalworking, and construction. Equipped with a durable bubble level for horizontal and vertical alignment, and a scribe tool for marking measurements, it's a versatile addition to any toolkit. The ruler is made from high-quality stainless steel with etched markings for longevity and clear readability, making it resistant to corrosion and perfect for heavy-duty use. The square head can be smoothly adjusted along the ruler and securely locked with a sturdy brass bolt, allowing for easy transition between measuring angles and straight lines. The combination square features clear and precise graduations in both inches and metric, suitable for professionals and DIY enthusiasts who require exact measurements. Mr. Pen 12" combination square is a multipurpose measurement instrument, ideal for ensuring precision and accuracy in woodworking, metalworking, and construction. Equipped with a durable bubble level for horizontal and vertical alignment, and a scribe tool for marking measurements, it's a versatile addition to any toolkit. The ruler is made from high-quality stainless steel with etched markings for longevity and clear readability, making it resistant to corrosion and perfect for heavy-duty use. The square head can be smoothly adjusted along the ruler and securely locked with a sturdy brass bolt, allowing for easy transition between measuring angles and straight lines. The combination square features clear and precise graduations in both inches and metric, suitable for professionals and DIY enthusiasts who require exact measurements.