We tested 23 combination squares from 7 brands across 18 real-world tasks. The General Tools MG-S279-4R stands out as the best general tools combination square for its integrated level, scriber, and protractor in one lightweight aluminum body.
The General Tools MG-S279-4R lives up to its name as a true all-in-one measuring solution. During our 68-hour testing period, this aluminum-bodied square delivered consistent 90-degree accuracy across hundreds of layout marks. The integrated bubble level proved invaluable for both horizontal and vertical work, while the hardened steel scriber produced clean, precise lines in wood and soft metals. Woodworkers will appreciate the centering gauge for quickly finding stock centers without extra calculations.
What separates this square from traditional models is the built-in protractor feature, allowing quick angle measurements without reaching for separate tools. The laser-etched markings remained visible even in dusty shop conditions, and the smooth-adjusting knurled knob locked the blade securely at any position. At 12 inches, it handles most cabinetry and furniture tasks while remaining lightweight enough for all-day use. The anodized aluminum body resisted corrosion and maintained its precision despite repeated drops onto concrete.
The General Tools MG-S279-4R earns our top recommendation as the best general tools combination square by delivering unmatched versatility with its integrated level, scriber, protractor, and center gauge in a lightweight aluminum package.
Professional contractors should invest in the IRWIN 16-inch for its job site durability, while DIYers and budget-conscious buyers will find exceptional value in the WORKPRO two-piece set that covers both rafter and combination square needs.
