Precision Square Set — Machinist

The Zeptix Supplies Precision Square Set provides three sizes of hardened, ground steel squares for machine setup, joinery verification, and precision layout work where a combination square is either too large or not accurate enough. The set includes two-inch, four-inch, and six-inch squares, each ground and lapped to a squareness tolerance of plus or minus half a thousandth of an inch — the kind of accuracy that matters when you are setting a table saw blade to ninety degrees, truing a drill press column, or verifying that a freshly planed board is actually flat and square. The reference faces are hardened to resist wear from repeated contact with steel machine surfaces, and the satin finish eliminates glare under shop lights. Each square nests neatly in a fitted velvet-lined case that prevents edge contact during storage. Unlike consumer-grade squares that claim accuracy on the package and fail a straightedge test, these squares are individually inspected and certified. For the woodworker, machinist, or tool collector who understands that every measurement downstream depends on the square being actually square.