Aluminum Construction Square Grot EBEN 400 mm — G-400-0740

Grot EBEN 400 mm aluminum construction square (model G-400-0740) is a rigid L-shaped measuring tool designed for marking and checking right angles in construction and woodworking tasks. Constructed from lightweight aluminum, it offers corrosion resistance and a 400 mm leg length for precise layout work. The tool is intended for squaring edges, measuring and transferring perpendicular lines on boards, frames and panels, providing a stable reference for joinery, assembly and installation activities.

Advantages

The aluminum body combines low weight with durability, making the square easy to handle on site and in the workshop. Its accurate 90° geometry ensures consistent results when checking corners and aligning parts. Corrosion-resistant material maintains measurement reliability over time with minimal maintenance. The 400 mm legs provide a balance between reach and portability suitable for medium-sized panels and framing work.

Suitable for

• Marking and checking right angles on wooden boards and panels
• Squaring frames, cabinet components and door assemblies
• Layout and transfer of perpendicular lines for cutting and drilling
• On-site carpentry, joinery and general construction checks

Key specifications

• Material: aluminum (corrosion-resistant)
• Shape: L-shaped construction square
• Leg length: 400 mm
• Function: marking, checking 90° angles, transferring perpendicular lines
• Weight: lightweight for handheld use

How to use

Place the inner corner of the L-shaped square against the edge or corner to be checked or marked. Ensure the square sits flush on both surfaces before scribing or marking along the outer edge. For transfer of perpendicular lines, hold the square firmly in position while using a pencil, awl or marking knife to trace the line. When checking assembled components, align the square at internal or external corners to confirm 90° accuracy. Store the tool in a dry place to preserve the aluminum finish.

Usage recommendations

Regularly inspect the contacting edges for nicks or burrs and clean the surfaces to maintain accurate contact. Use a thin coat of light oil only if the tool is frequently exposed to harsh environments; avoid abrasive cleaning that could alter the square's edges. For best results on critical assemblies, verify the square against a known reference before layout.