Carpentry Squares

Select a square based on task: try a combination or framing square (12–24 in.) for layout and rafter work, a try square (4–8 in.) for edge and joinery checks, and a precision engineer’s square for fine machinist-style accuracy; consider blade length, stock thickness, and whether you need metric, imperial, or dual markings

Look for hardened steel or stainless steel for durability and stable edges; accuracy is typically specified in degrees or arcminutes—shop for squares with certified right-angle accuracy if your work demands tight tolerances and avoid cheap stamped metal if straightness and wear resistance matter

Digital and adjustable squares add features like angle readouts and repeatable bevels useful for complex angles and layout, but fixed precision squares are simpler, more durable, and often sufficient for pure 90° checks; choose digital if you need quick angle measurements beyond basic squaring

Keep squares clean and dry, wipe off pitch or debris after use, store them flat or hung to avoid bending, and avoid dropping or using them as pry bars; periodically check against a known reference or a milled surface and recalibrate or replace if you detect wear or twist

Expect a wide range—basic try or combination squares are commonly priced under $50 while higher-precision, branded or larger framing squares often range higher; generally, increased price correlates with better materials, tighter tolerances, and more durable markings

Useful markings include clear imperial and/or metric scales, graduated graduations for common layout increments, and scribe or center-finding markings; deep-etched or laser-engraved scales resist wear better than painted markings

Many carpentry tasks require other tools for non-90° angles; use framing squares with common hip/val tables, adjustable bevels, sliding T-bevels, or digital protractors for precise non-right angles—some combination squares include adjustable heads to transfer angles