Adjustable 250 mm Construction Square Irwin 10503546

The Adjustable 250 mm Construction Square Irwin 10503546 is a handheld layout and measuring tool with a 250 mm arm length and an adjustable angle setting. Designed for marking and checking right angles, mitres and general layouts, this Irwin construction square combines a rigid arm and an adjustable head to transfer and repeat angles accurately on wood, drywall and framing materials. Its compact size makes it suitable for on-site carpentry and joinery work where edge alignment and repeatable angle checks are required.

Advantages

This adjustable construction square provides precise angle transfer and repeatable measurements without the need for multiple tools. The 250 mm arm offers a balance between reach and portability, allowing use in tight spaces while maintaining a stable reference edge. The adjustable head locks securely to preserve the selected angle during marking and checking. Built to withstand typical site conditions, the tool is suitable for frequent handling and quick adjustments.

Suitable for

• Carpentry layout and framing
• Joinery and cabinet marking
• Checking and marking right angles and mitres
• Drywall layout and fixture positioning
• On-site trim and finish work

Key specifications

• Arm length: 250 mm
• Adjustable angle head for marking and transfer
• Handheld layout and measuring format
• Suitable for wood, drywall and framing materials
• Secure locking mechanism for angle retention

How to use

Place the 250 mm arm along the reference edge of the workpiece and open or rotate the adjustable head to the required angle. Tighten the locking mechanism to secure the angle, then use the straight edge of the arm and the head to scribe or mark the workpiece. For repeatable cuts or multiple identical parts, keep the angle locked and use the square as a template to transfer the same setting. When checking squareness, align the arm with one face and verify contact along the head to confirm a right angle or the set mitre.

Usage recommendations

To maintain accuracy, store the square in a dry place and avoid dropping or severe impacts. Clean sawdust and debris from the locking mechanism regularly and check the lock before transferring angles. For best results on finished surfaces, use a sharp marking pencil or scribe and ensure consistent pressure while tracing the edge.