Westcott Engineers' Protractor Ruler, Dual-Scales Cm and Tenths-Inch, Back-to-School, School Supplies, Classroom Supplies, 6-Inch

The best ruler for a Field Geologist. Cannot recommend it higher. It has inches, cm, a protractor, solid edges, easy to store, see through, grids, just an amazing ruler for working out in the field.

Good, but i misjudged the size i needed. Will purchase some bigger one

This is a convenient device for measuring angles and small lengths. I got this to throw in my to-go box of drawing and sketching tools. The only downsides are 1 - the markings are printed, not etched so, it'll wear off eventually, and 2 - it's difficult to read because the device is so small. But, size, weight, price are what makes this so good. (My pic has shadowing & isn't the best - printed markings are nice & sharp.) It's for occasional use, not daily heavy duty use. All in all, a good buy.

Really its worth the $3 to have. I actually bought another one that i can keep in a bag while this one stays at home. The edges are a little rough, but are easily sorted out with a sheet of 220 grit sandpaper and a butane lighter. Its pretty thin which isn't inherently a bad thing as that makes it flexible, but you wouldn't want to throw it in a bag loosely with anything remotely heavy or it might fold. Overall I like the scale (obviously enough to buy two) and would recommend picking one up for yourself.

The Good - This little ruler / protractor is surprisingly accurate! I wasn't expecting too much for the price, just wanted it as a general sketching tool, but then it helped me discover that my $100+ precision carpentry square wasn't really "square" after all. I couldn't believe it at first, but then I went and checked it on a machinist's precision reference square and sure enough, my expensive square wasn't 'square' and the sub-$2 ruler was not only square, but also more accurate. The (very minor) negative - This thing would be a grand-slam if the increments were in 16ths of an inch, rather than 10ths of an inch (which is neither metric nor SAE / imperial). Even if it was metric it would be okay, but 10ths of an "inch" are really only useful to a draftsman (machinists measure in 1000ths). Anyway, very handy little ruler for all kinds of stuff, so I highly recommend!

Bought these for my 6th Grade Math students. They work well. I look at this as a long term item for the students that they will use in future classes. I have had a Westcott 6" ruler for many years. Great rulers in general.

Well made. Expect it to hold up well to use over time.

I ordered a couple of these to use when sketching out my design projects. I sketch freehand but occasionally need to draw a truly straight line. These rulers are acceptable for the job, but not even close to the high quality six inch vintage C-Thru rulers I have stashed away. Not bad for the price though.

Works well, good resolution. Using for replicating objects as 3D drawings in Fusion.

This ruler is the most fragile ruler that I have ever held. I would not bother with it, as it can snap so easily.

Es muy práctica para subrayar libros por su resistencia y flexibilidad.

Hands down my favourite daily use ruler. I've lost one and replaced it with two more. Great for technical sketching in parametric & dimetric; perfect for drawing offset lines in perspective using the printed grid as reference, the ultra-fine grid makes "not hitting a reference point" nearly impossible. The ability to have a functional protractor and ruler, where lines carry out to the rulers edge is invaluable in a single tool, no guesswork or connecting the dots required. After reading some of the negative reviews- the edge is perfectly straight, hold it down with two fingers while drawing and you'll be just fine. No this isn't a heavy gage stainless steel, cork backed straightedge. No this isn't an architectural scale divider. No this isn't a super heavy duty tool. No it isn't a 30 cm straightedge (just as the product details spell out) This is a 10$, multifunctional piece of plastic. Yes it might arrive creased, just as any thin piece of plastic shipped in a paper envelope might; my firs one did- bend it back, or send it back. If I had to offer one criticism, it's that it may smudge your sketches if you aren't careful, but adding a lifted cork backing would defeat the purpose of a transparent ruler. Can't recommend this enough!

This is probably one of the flimsiest rulers ever. Was expecting much better quality and if it was 30cm even better