Boomgood Machinist Square Set – 4-Piece 90° Right Angle Ruler, Hardened Steel, DIN 875 Grade 1

Meet the Boomgood Machinist Square Set

Engineered for steady performance, this four-piece square set delivers reliable 90-degree reference across precision tasks. The heavy base feels substantial in hand, reinforcing balance during layout and setup work, while the blade and beam pairing remains firmly aligned. With a design tuned for straightness and rigidity, this tool helps you verify angles with confidence rather than guesswork.

Why this square stands out

Each component is crafted to support clear, repeatable results in real-world environments—from busy workshops to quiet laboratories. The blade is permanently fixed to the beam with tapered self-locking rivets, removing wobble at the source and delivering true right angles for layout and inspection.

• Sturdy, balanced construction: a heavy square base enhances stability for precise measurements.
• Rigid, fixed joint: blade-to-beam connection remains solid under use due to tapered rivets.
• Precision-ground surfaces: blade edges and beam faces are lapped and polished for straightness and parallelism.
• Inside notch for accuracy: helps you locate the exact reference point during measurements.
• DIN 875 Grade 1 accuracy: built to the standard trusted by professionals.

What’s included and sizes

The set comprises four squares to cover a range of tasks: 63×40 mm (2.5×1.6 in), 80×50 mm (3.2×2 in), 100×63 mm (4×2.5 in), and 160×100 mm (6.3×4 in). Each size is designed to work in tandem with precision layout, machine setup, or lab measurement workflows.

• Four sizes: expands your reference options from compact to larger layouts.
• Plastic storage case: protects accuracy during transport and storage.

Real-world use cases

In woodworking, metalworking, or lab setup, you can quickly verify square corners, align workpieces, and check component placement. The tool’s weight and balance make it a tactile reference you’ll reach for when precision matters most, while the polished surfaces minimize drag during sliding checks.

Care and longevity

Store in the provided case and wipe away any oil before use. The hardened 45# steel construction is designed to resist wear, helping maintain accuracy across many projects.

Bottom line

The Boomgood Machinist Square Set offers a practical blend of heft, rigidity, and accuracy. It’s a dependable reference for anyone who values consistent right angles and repeatable results in everyday tasks, without overpromising outcomes.