Aluminium Alloy Triangle Ruler Square 7 inch 12 inch Black Oxidation for Accurate 90 and 45 Degree Marking

This triangle ruler square is designed for anyone who needs reliable right-angle and mitre measurements during woodworking, engineering, or drafting tasks. The black oxidation coating reduces reflection on the scale, making it easier to read graduations under workshop lighting. Constructed from aluminium alloy, the ruler remains both lightweight and rigid, helping you maintain consistent accuracy without arm fatigue. With two available lengths and the choice of metric or British graduation systems, it fits a range of marking and checking applications.

Features and Construction

The ruler is built around a straightforward triangle profile that combines a 90-degree square edge with a 45-degree angle. This single tool replaces the need for separate squares and mitre gauges in many common layout tasks. The aluminium alloy body provides adequate stiffness for everyday use while keeping the overall weight low.

Material and Build

The ruler is manufactured from aluminium alloy, chosen for its balance of strength and low mass. A black oxidation finish is applied to the surface, which helps minimise glare and provides a matte appearance that resists minor scratches. The edges are machined to maintain straightness and squareness within the stated tolerance.

Size and Practical Fit

Two lengths are offered: a 7-inch version and a 12-inch version. Each model has an overall dimension of 30 x 30 cm for the 12-inch version, with the smaller version scaled to fit in toolboxes or apron pockets. The net weight of the 12-inch model is 225 grams, making it easy to handle for extended periods.

Uses and Placement

This square is primarily intended for layout and checking tasks where 90-degree and 45-degree angles are required. It suits workbenches, drawing boards, and site work where portable measuring tools are needed.

Woodworking and Joinery

Use the square to mark out shoulder lines, tenon cheeks, and mitre cuts on timber. The 45-degree edge helps set up picture frames, boxes, and angled joints without additional calculation.

Engineering and Drafting

For metalwork or technical drawing, the ruler provides a reference edge for scribing lines at right angles or 45 degrees. The black finish improves contrast against bright metal or white paper, aiding readability.

Benefits and Buying Value

Choosing a single tool that covers two common angles reduces clutter on your workbench. The aluminium construction and black oxidation finish offer practical advantages in everyday use without adding unnecessary weight.

Reuse and Low Maintenance

The oxidation coating resists corrosion from workshop moisture, and the aluminium body will not rust. Simply wipe the ruler clean after use to keep the graduations legible. No special maintenance is required beyond normal care.

Why Choose This Product

If you need a reliable, portable square for repetitive measuring and marking tasks, this triangle ruler gives you the two most frequently used angles in a single tool. The option between metric and British graduation systems allows you to select the scale you work with most often.