Aluminium Alloy Triangle Square 7 Inch 12 Inch Black Oxidation Profile 90 Degree 45 Degree Ruler for Measuring and Marking Metric and Imperial Systems
Aluminium Alloy Triangle Square 7 Inch 12 Inch Black Oxidation Profile 90 Degree 45 Degree Ruler for Measuring and Marking Metric and Imperial Systems
Aluminium Triangle Square with Black Oxidation – 7 or 12 Inch for Accurate 90° and 45° Marking
This triangle square from a precision aluminium profile offers reliable 90° and 45° angle references for layout work, joinery, metal marking, and general craft tasks. The black oxidation finish cuts down glare on its graduated scales, making readings clearer under bright workshop or daylight conditions. Available in two sizes – 7 inch and 12 inch – each with a choice of metric (1 mm graduation) or British imperial (1/16 inch graduation) markings, this tool meets the needs of both engineers and woodworkers. Its 225-gram weight and compact 30*30 mm profile give it enough substance to stay stable against workpiece edges while remaining easy to slide and reposition as needed.
Features and Construction
The square is built from a single aluminium alloy extrusion, which provides consistent straightness across its entire length. The black oxidation finishing process adds a protective layer that resists minor scratches and helps the scale stand out without reflection.
Material and Build
Aluminium alloy is selected for its low density and adequate rigidity. At 225 grams, the square does not add unnecessary weight to a tool pouch or toolbox. The 30*30 mm cross-section gives the profile enough thickness to feel robust in hand while still fitting into narrow storage slots. The oxidation coating is applied evenly, so there are no uneven patches that could affect legibility.
Size and Practical Fit
The 7-inch version suits compact workspaces, portable tool kits, and smaller workpieces, while the 12-inch version extends reach for wider boards, panels, or framing tasks. Both sizes offer the same cross-section and graduation density, so switching between them does not require adjustment to technique. The metric scale has a 1 mm smallest division, and the imperial scale reads in 1/16 inch increments, giving clear reference marks for common tolerances.
Uses and Placement
Because the square provides both 90° and 45° references from a single body, it reduces the need to switch tools when marking common joinery angles or checking squareness.
Workshop and Professional Use
In woodworking, the 45° face is useful for mitre cuts, dovetail layout, and corner checks. The 90° leg serves for edge squaring, tenon marking, and assembly alignment. For metalwork, the square can be used to set up workpiece edges before welding or machining, and the clear graduation lines allow direct measurement of short offsets. The black finish reduces reflections on shiny aluminium or steel surfaces, helping the scale stay readable.
Everyday Home Use
Home DIYers will find the square handy for hanging shelves, checking that cabinet doors align, marking cut lines on timber, or setting up simple jigs. The lightweight design means it can be held in one hand while marking with the other, which speeds up repetitive tasks. The 7-inch model is especially convenient for fitting into a household toolbox without taking up much space.
Benefits and Buying Value
A single tool that delivers two common reference angles and a built-in scale eliminates the need to carry separate squares or protractors for routine jobs.
Reuse and Low Maintenance
The aluminium construction resists rust, and the oxidation coating protects against normal workshop humidity and sweat from handling. A quick wipe with a dry cloth after use is usually enough to keep the scale legible. There are no moving parts that could wear or loosen, so the square retains its calibration over many uses.
Why Choose This Product
For someone who needs a reliable right-angle and mitre reference with integrated measuring scales, this triangle square provides both in one tool. The choice of metric or imperial markings means it can match the drawing or standard you already work with. The black oxidation finish is a practical upgrade over bare aluminium because it cuts glare and adds surface protection. With two sizes and two scale options, you can select the exact version suited to your typical workpiece dimensions and preferred measuring system.
