Speed Square 18cm 7in set square ruler

A Speed Square set square helps you mark and measure corners and drilling positions with less guesswork. This Preciva 18cm / 7in triangle ruler set from an aluminium alloy build is designed for steadier layout work, whether you are drawing lines, checking angles, or setting holes for screws. With a T-shaped base and a scale for grip and alignment, it is a practical tool to keep your carpentry marking accurate, even during busy workshop sessions. 📐

Key features

This aluminium alloy triangle ruler set is built around versatility, so you can handle a wide range of layout tasks without switching tools. It can draw 45° and 90° angles, which is useful when you are laying out right angles for frames, braces, and general carpentry work. It also supports balance and vertical line tasks, helping you keep markings consistent across a project.

One of the standout benefits is the drilling hole positioning support. The set includes positioning holes in 14 sizes, covering a range from 3 mm to 15 mm, so you can select the right hole quickly when you are preparing for drilling. You can also use the positioning table height feature to control how your marks and drilling positions relate to the workpiece, keeping setups more repeatable.

The size matters for real-world accuracy, and this triangle ruler uses an 18 cm / 7 in format, with the longest side reaching 180 mm. The longer reach supports better adaptation to different work needs, while still using metric units that are easy to read. The ruler is also designed for more stable use thanks to its widened T-shaped base.

If you often find that a marking tool slips during screw fixing or line drawing, the base is intended to help. When the base fits against the edge of the wood, the ruler should not slide easily, giving double stability and supporting accurate results. And because the body is made from high quality aluminium alloy, it is described as high hardness, not easy to deform, and durable.

Tech specs

• Name: Speed Square, Preciva 18cm / 7in Set Square
• Type: Triangle ruler with positioning holes
• Format: Metric units
• Size: 18 cm / 7 in
• Material: Aluminium alloy
• Capacity: 14 types of positioning holes
• Positioning hole range: 3 mm to 15 mm

What’s included

You get a triangle ruler set square made for marking and drilling layout tasks. The package includes a set square with a widened T-shaped base and scale, plus positioning hole capability across 14 sizes. It is built to help you draw angles, set line guidance, and locate drill holes more reliably.

The set is intended to reduce the time spent hunting for the correct hole size during a layout step. When you are working through screw and drilling preparation, the positioning holes support quick selection from the 3 mm to 15 mm range. This makes it particularly handy for regular joinery and general DIY where you want consistent, measurable outcomes. 🙂

Who it’s for

It’s a good fit if you regularly do carpentry marking where angles and drilling positions need to be right the first time. You will like it if you want a compact, metric-friendly tool for 45° and 90° angles, vertical and balance line tasks, and repeatable drilling layouts. It makes sense if you prefer aluminium alloy tools that feel solid in the hand, with a base designed to sit against the edge of timber.

It may not suit you if your workflow depends on imperial marking only, since the set uses metric units throughout. Better avoided if you need a specialised jig beyond positioning and line marking, because this tool is focused on set square functions and drill hole placement rather than powered drilling. In a workshop or on site where measuring and layout are constant, though, Speed Square, Preciva 18cm / 7in Set Square can be a practical addition for everyday accuracy. 🔧