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📐 Elevate your precision game with the ultimate drafting essential!
The Mr. Pen 45 cm T Square is a premium drafting tool made from durable carbon steel, featuring laser-etched dual-sided inch and centimeter measurements. Designed for architects, engineers, and artists, it functions as a T square, L square, and ruler, ensuring precise alignment and versatility. Proudly crafted by a small American family business founded by teachers, it combines quality, accuracy, and community-driven values.






| Asin | B07F1XKFZX |
| Best Sellers Rank | #29,305 in Office Products (See Top 100 in Office Products) #141 in Drafting Tools & Drafting Kits |
| Brand Name | Mr. Pen |
| Color | black, white |
| Customer Reviews | 4.6 4.6 out of 5 stars (3,603) 4.6 out of 5 stars |
| Graduation Range | 1/16 inches |
| Manufacturer | Mr. Pen |
| Material Type | Carbon Steel |
| Model | TS18 |
| Number Of Items | 1 |
| Part Number | TS18 |
| Style Name | T,L Square,Square,T Square |
| Upc | 853126008272 |
User
Nice and sturdy
I'm very pleased with the quality of this T square. Very sturdy
User
It has measurements on both sides. Onecentimeters and inches, and the other side shows.
Excellent product, even better than I expected. The quality is indescribable. Measures on both sides. Ideal for precision in crafts and other projects. 100% recommend. Received on time.
User
Well made and useful
Love the T Square. It is very useful for lining up my leather and getting the cut where I want it. Also, seems very well built. I will buy again from Mr. Pen.
User
Everything about this ruler is great but for one thing....
This ruler is easy to read, it is at a nice easy size to make it easy to spin around and hang near a desk. I did measure mine with a very accurate ruler and marks are spot on.But this is where it fails. There is no bumper bar so you can snug it up against a desk edge or the medium you are working on or a pad.So, with a little bit of time in a 3D CAD software package and my 3D printer, I made two of my own. I created a piece that fits over the T part of the ruler and creates a edge to hook against the desk edge from the farthest edge of the T. I made a second one that aligns exactly on the cross of the long part of the T so that you can line the 0 right to the edge of the paper. Would have been far easier if they either sold or included this item but it was easy enough to make. Hopefully they make a change like this in a future version of the ruler.Very happy otherwise, would recommended with the caveat that there is no edge if one is required. Otherwise, this the most readable ruler I have used in some time.
User
Quick T- Square
Small and compact and works well on a portable drawing table I have in my job trailer. Fits in the brief case that I carry all my drafting equipment in. Good value.
User
Great product and seller!
I rarely ever review anything on Amazon, but this is worthy of a review. Very nice product, would buy again.
User
Mr. T ruler
As a beginner this tool was helpful to do my shirts. The size was perfect. I would recommend it.
User
Not a straight edge
This doesn’t have a ridge on it to slide up and down for a straight edge. Unfortunately, my window of return closed. It’s nice and solid. Just not what I’d use it for.
User
Perfect for layout of door jambs or window jambs
I love this square because it’s small enough to fit on my pouch hook and it’s great for tight layout of door jambs and window jambs.Recommend for all trades men doing floor layouts.
User
Description is WRONG
Description says 1mm increments. It's 2mm increments which is unusual & hard to adjust to when trying to work fast. If you want advice on making a better ruler do this => Count in Centimeters W/1millimeter increments for the etchings.
User
Perfect of cards
I purchased this T square to help my make my greetings cards as the one I had broke. Fast delivery and good quality. I would purchase this again if needed. Thank
User
Muy buena regla T
Es un regla que superó la calidad que esperaba, es metálica y de una sola pieza por lo qur supongo que será extremadamente durable, incluso es pesada y tiene la medición en centímetros y en pulgadas. Definitivamente es un producto que si recomendaria para un adulto pues incluso es tan fuerte que puede resultar pesada para un niño.
User
Great for fab work
Bought this product because I seen another coworker with something very similar. That was just a little bit bigger than this one but overall I’m extremely happy it fits in my toolbox great and it’s great for metal fab layout.
Trustpilot
2 weeks ago
1 month ago