Rena Chris Architectural Metric Scale Ruler: 30cm Ruler, Aluminum Architect Scale, Laser Etched Triangle Scale Ruler, Scale Ruler for Blueprint, Drafting Ruler, Metal Scale Ruler, Architecture Ruler

I recently pick up this Rena Chris metric scale ruler for my architectural studies and it is exactly what I need for my studio work. It is made from solid aluminium which gives it a really nice weight of about 110g, so it doesnt slide around on the paper when I am trying to draw straight lines. The black finish looks very professional and the laser-etched markings are white and very easy to read even in the dim lighting of the library.The range of scales is spot on for most building projects, including 1:20, 1:25, 1:50, 1:100, 1:200, and 1:500. I find it particularly useful that it includes 1:20 for those detailed wall sections and 1:500 for the larger site plans. It is a 30cm ruler which is the standard size, and it feels much more durable than the plastic triangular ones that tend to chip at the edges over time.Compared to using a standard flat ruler and doing the math in your head, this scale rule saves so much time and prevents those annoying calculation errors. You can just read the real-life measurements straight off the page. While a digital CAD program lets you draw at 1:1, having a physical tool like this is essential when you are sketching ideas by hand or checking a printed drawing with a tutor.One thing to keep in mind is that because it is metal, the edges are quite sharp and precise, which is great for accuracy but you have to be careful not to scratch your desk. Also, the black coating might eventually show some wear if you throw it loosely in a bag with other metal tools. Overall, it is a high quality piece of kit for the price and much better than the cheap plastic alternatives you find in most stationery shops.

Very good and must buy

Perfect for a person with a paralysed hand.

I chose this ruler for technical drawing and scale checks on printed plans, expecting accuracy and durability rather than decorative appeal. In the hand, the aluminium body feels rigid and precisely machined, with a reassuring weight that keeps it from sliding across paper. The laser-etched markings are crisp, deeply cut, and easy to read under workshop lighting, which matters when working quickly. I checked several metric scales against known references and found them accurate, with no visible drift or misalignment along the length. In day-to-day use, the triangular profile is practical, offering multiple scales in a compact footprint, though it does make it slightly less comfortable to hold for long measuring sessions compared with a flat rule. Edges are cleanly finished but not chamfered enough to be truly ergonomic. While it lacks any grip coating, it stays put reasonably well on smooth paper. Overall, it is a precise, well-made drafting tool that prioritises function over comfort.

Real good quality, easy to read. Comes in a nice protective case.

Excellent product and speedy delivery. Thank you

Fantastic ruler I have brought a fair few normal flat plastic/metal rules in the past and found they are ok, but.. This 3 side triangle type ruler feels way better and seems easier to hold down keeping it in place whilst drawing a straight line. This ruler is solid aluminium, edges rounded, so no shape corners to damage the surface your working on. It comes in a handy plastic triangle tube to keep it in. Pleased with my purchase

Just what I wanted

This scale ruler makes a strong first impression with its solid metal build and clean, precise markings. The aluminum body feels sturdy and slightly weighted, which helps it sit flat on drawings without sliding around. The etched markings are crisp and easy to read, with good contrast that doesn’t strain the eyes under desk lighting. The triangular shape feels balanced in hand, and the overall finish gives it a professional, durable look rather than something flimsy or disposable. After using it regularly for drafting and reviewing drawings over several weeks, it’s been consistently accurate and comfortable to work with. The different scales are easy to switch between, and the ruler glides smoothly across paper without catching edges. It holds up well in a backpack or desk drawer, with no visible wear or fading on the markings. One small drawback is that the metal edges can feel a bit cool and firm during long sessions, which may take some getting used to if you’re accustomed to lighter plastic tools. Overall, this is a great choice for students, designers, or professionals who want a reliable and precise measuring tool for regular use. It’s especially well suited for anyone working with detailed plans who values durability and clear markings. Those who prefer ultra-lightweight tools or softer edges may want a different option. For the accuracy, build quality, and long-term usefulness it offers, the price feels more than fair.

These scale rulers are nice. The kind of nice I buy a whole bunch of, and scatter all over my life in the purse, on the couch, with the drawing supplies by the toilets, (some people like their drafting and drawing a lot and I am one of those freaks) and in the truck (stash one in my partner’s car) and by my bedside—I draw to scale a lot; it’s pretty much the only way I do draw, so having a scale ruler in my daypack for hiking is normal. I love that these laser etched rulers are probably sufficiently durable that I could possibly take out a cougar while drawing like a nerd in the woods and I hope the laser etched markings last eons beyond their plastic peers in this arena—seriously; I’ve carried around plastic scale rulers till the itty bitty markings would start to wear off and the ruler would be useless. But the expected lifespan of the markings on this ruler is certainly greater—I do not actually know real numbers; but I do know laser-etched usually means ‘marked forever’. I shall update this review when I start to rub the anodized finish off—so far in my lifetime I have never worn the anodized finish off of a lot of anodized things I own, but it is absolutely doable. Wish me luck wearing the laser etching and the anodization down!

I often use a scale ruler for architectural use on exact dimensions on drawings. Plastic rulers are fine but not exact enough for the scale dimensions I want, this aluminum scale ruler is made of quality, allowing for sharp straight lines. It’s blue color is perfect for contrast, perfect size and all for a great price!!!

Some other tradesmen stole mine so I had to rebuy it. It’s a good item when someone else wants to take it from you

Goes great with my speed square. Easy to read, nice color. Nice finish.