These are Matco Tools Extra-Long Double Box End Wrenches in fractional SAE (Standard Inch) sizes.The visual layout clearly shows fractional stamping configurations such as 1/2, 9/16, 11/16, and 3/4 stamped directly into the center recessed beams of the non-ratcheting, high-leverage chrome tools.The design profile features a deep 15-degree double offset at the box ends, which provides necessary finger and obstacle clearance when working down long engine components or flush-mounted structural fasteners.
Series Specs & Sizing BreakdownProduct Line: Matco Double Offset Extra-Long Box Series / Matco Wrench CatalogGeometry: High-clearance offset box heads paired with heavy-walled 12-point openings. The design grips structural hardware across flat surfaces to increase maximum torque thresholds without rounding metal points.Standard Set Coverage: Full professional sets in this layout traditionally include progression sizing spans like:1/4" x 5/16"3/8" x 7/16"1/2" x 9/16"5/8" x 11/16"3/4" x 13/16"7/8" x 15/16"