FIT-UP PRO Flange Squares are heavy-duty tools designed for precise flange alignment and squareness in pipe and tube construction. Available in three models—12 × 12″ / 300 × 300 mm, 16 × 16″ / 400 × 400 mm, and 20 × 20″ / 500 × 500 mm—each square features a 30 × 5 mm cross-section for added strength and durability. Constructed from high-grade steel, these squares are specifically engineered for adjusting and aligning flanges, ensuring they remain square to the pipe face. Their rigid frame eliminates flexing, allowing fabricators to achieve true 90° angles with confidence. Whether you’re assembling pipe spools or installing flanges on-site, these tools streamline the process and reduce misalignment risks. FIT-UP PRO Flange Squares are essential for maintaining the integrity of welded systems in critical industries, offering consistent performance, jobsite reliability, and the precision needed for repeatable, high-quality results.