Aluminium Carpenter's Square AWTools AW29853BL 12" (30 cm) Black Line

The AWTools Aluminium Carpenter's Square AW29853BL 12" (30 cm) Black Line is a lightweight aluminium square designed for measuring and marking right angles and checking squareness in woodworking and joinery. Its 12" (30 cm) blade provides a compact measuring length suitable for bench work, fixture setup and layout tasks. The corrosion-resistant aluminium body and clearly defined edges allow for accurate alignment and repeated use in workshops, on-site carpentry and DIY projects.

Advantages

The aluminium construction combines low weight with good rigidity, making the square easy to handle without compromising on stability during marking and measurement. The black line finish improves contrast against the workpiece for clearer sighting and alignment. Sharp, straight edges reduce error when drawing lines or guiding a saw or router fence. The compact 12" (30 cm) size fits into tool bags and work belts for convenient transport.

Suitable for

• Measuring and marking right angles on boards and panels
• Checking squareness of assembled components and frames
• Guiding cuts and setting fences for saws and routers
• Layout work in small workshops, on-site carpentry and DIY projects

Key specifications

• Material: anodised aluminium body for corrosion resistance and reduced weight
• Blade length: 12" / 30 cm blade for compact measurement and layout tasks
• Finish: black line contrast finish to aid visibility against work surfaces
• Edges: straight, machined edges designed for accurate marking and alignment
• Weight: lightweight design suitable for hand use and portable storage

How to use

Place the square with the stock (short side) firmly against the reference edge of the workpiece so the blade lies flat on the surface to be marked. Use the machine-cut edge as a guide to scribe a line or to sight the right angle. For checking squareness, align one face of the square with a reference surface and inspect the meeting edge for gaps or mismatches. When guiding a saw or router, hold the square steadily or clamp it in position to maintain a consistent edge. Keep the square clean and free of debris to preserve accuracy.

Usage recommendations

Store the square in a dry place to avoid corrosion despite the anodised finish. Avoid using the square as a pry bar or striking tool to prevent bending. For highest marking precision, pair the square with a sharp marking knife or pencil and verify calibration on a known square reference before critical layout work.