Speed Square 12in 300mm Aluminium Roofing Layout

A 12in 300mm speed square for quick measuring, marking and layout work across roofing, carpentry and general site jobs. The compact triangular format gives you a straightforward way to mark angles, straight lines and cut lines without carrying a bulkier square.

Used by roofers, joiners, carpenters and DIY users, this type of square is handy when setting out rafters, marking timber and checking lines before cutting. It suits building site work, garage jobs, workshop use and home maintenance where fast, repeatable marking helps keep work moving. For timber fitting, basic layout tasks and everyday repair work, it is the sort of tool that gets picked up regularly.

This 12in rafter square has enough reach for common marking jobs while still being easy to store in a toolbox or keep close to hand on site. Its aluminium construction keeps the square lightweight and easy to handle, which is useful when working one-handed or moving between marking points. The speed square pattern is widely used for roofing and carpentry layout, making it a practical choice for repeated measuring and marking rather than a tool that sits unused. When quick checks, clean lines and simple setup matter, having a square like this nearby helps avoid unnecessary hold-ups.

Speed square specifications

• Size: 12in / 300mm format for everyday measuring and marking tasks.
• Construction: Aluminium body for a lightweight, easy-to-handle feel.
• Application: Useful for roofing, carpentry and general site layout work.
• Function: Helps with marking angles, straight lines and timber cut lines.
• Use: Suited to trade work as well as general DIY projects and home workshop jobs.

A useful quick square to keep close by for regular marking and setup work.