Angle Square Irwin 300 mm model 10503544 — construction measuring tool

Irwin Angle Square 300 mm model 10503544 is a handheld construction measuring tool designed to provide a reliable 90° reference for carpentry and general building work. The compact 300 mm size allows fast squaring of edges, transferring right angles and checking corners on site. Built for everyday use in framing, layout and joinery, this angle square combines a rigid body with clear measurement markings to support accurate marking and alignment tasks.

Advantages

The Irwin angle square offers a stable, fixed 90° reference that does not require adjustment, enabling repeatable squaring operations. Its compact length makes it easy to handle in confined spaces and carry on-site, while durable construction resists wear from regular use. Clear, easy-to-read graduations support precise marking and measurement transfer, reducing rework and saving time during layout and cutting operations.

Suitable for

• Squaring edges and verifying right angles on boards and panels
• Transferring measurements and marking cut lines in carpentry
• Framing, layout work and joinery on construction sites
• Checking corner squareness in furniture assembly and cabinetmaking

Key specifications

• Overall length: 300 mm suitable for standard carpentry tasks
• Fixed 90° angle for accurate squaring and alignment
• Rigid, single-piece construction for stability during marking
• Visible measurement graduations for straightforward measurement transfer
• Compact and lightweight for easy on-site handling and storage

How to use

Place the Irwin angle square with the stock flush against the reference edge of the workpiece so the blade lies flat across the face to be marked or checked. Use the blade edge or the visible graduations to mark cut lines or transfer dimensions accurately. For checking corners, align the stock against one face and observe whether the adjoining face aligns with the blade to confirm squareness. When marking repeated layouts, hold the stock firmly against the workpiece to avoid movement and use the graduations to replicate measurements consistently.

Usage recommendations

Store the angle square in a protected location to preserve the clarity of the graduations and prevent deformation. Clean dust and debris from the edges before precise marking. For greater longevity, avoid exposing the tool to prolonged moisture and inspect the blade periodically for straightness when high-precision work is required.