Angle Square Grot aluminum 300 mm model G-400-0730

The Grot Angle Square G-400-0730 is a 300 mm aluminum angle square designed for measuring and marking right angles and straight lines in construction and woodworking. Made from lightweight yet rigid aluminum, this hand tool provides stable reference edges for layout tasks, squaring corners, checking perpendicularity and transferring measurements on boards, frames and masonry during installation and assembly work.

Advantages

Lightweight aluminum construction reduces user fatigue while maintaining sufficient rigidity for accurate layout and marking. A 300 mm length offers a practical balance between reach and control for common carpentry and masonry tasks. The simple, open-frame design allows easy alignment with edges and surfaces, and the precision-machined edges provide repeatable contact points for consistent measurements.

Suitable for

• Carpentry: marking and checking right angles on boards and frames
• Masonry: transferring and verifying perpendiculars during installation
• Joinery and cabinetmaking: layout, squaring and fitting components
• General construction: on-site measuring, marking and quality checks

Key specifications

• Material: aluminum
• Length: 300 mm (blade length)
• Type: angle square for 90° measurements
• Weight: lightweight design for hand use
• Edge finish: machined edges for accurate contact

How to use

Place the square's inner corner against the workpiece corner or edge so that both arms contact the surfaces to be checked. Use the machined edges as guides to draw lines or scribe marks with a pencil or marking knife. For squaring operations, align one arm with a reference edge and transfer the perpendicular line with the opposite arm. When measuring or checking perpendicularity on masonry or assembled frames, ensure firm contact and avoid tilting the tool to maintain accuracy.

Usage recommendations

Keep the angle square clean and free of debris to preserve edge accuracy. Store it in a dry place to prevent corrosion and avoid dropping or bending the tool to maintain squareness. For best results, verify the square periodically against a known reference or a calibrated square when precise work is required.