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🛠️ Master your craft with precision and durability — don’t settle for less!
The Mr. Pen 12-inch professional compass is a heavy-duty, all-metal drafting tool designed for precision in woodworking, carpentry, metalwork, and more. It features a lockable sliding nut for repeatable measurements, a pencil holder for easy pencil changes, and can draw circles up to 30 inches in diameter, making it a reliable choice for professionals seeking accuracy and durability.







| ASIN | B086RV9W72 |
| Best Sellers Rank | 9,553 in Stationery & Office Supplies ( See Top 100 in Stationery & Office Supplies ) 12 in Drafting Compasses |
| Brand | Mr. Pen |
| Colour | Silver |
| Country Of Origin | China |
| Customer Reviews | 4.4 out of 5 stars 3,241 Reviews |
| Graduation Range | 12 Inches |
| Graduation range | 12 Inches |
| Item Dimensions L x W | 30.5L x 30.5W centimetres |
| Manufacturer | Mr. Pen |
| Manufacturer Part Number | GW01 |
| Material | Metal |
| Model Number | GW01 |
| Product dimensions | 30.5L x 30.5W centimetres |
| Style | Classic |
| Style Name | Classic |
| UPC | 850016784230 |
| Unit Count | 1.0 count |
P**E
Good quality.
Good quality item. Does exactly what it should do.
N**H
Heavy duty quality
Bought these to do some scribing. First thing you notice is the weight, these are hefty but in a reassuring measure of quality kind of way, you aren't going to accidently bend these, they're far more likely to damage your feet or your floor if you drop em. Once set out they aren't moving either. These have also come with a no quibble fix or replace warranty from Mr Pen - can you get that anywhere else for less than eight quid?? I highly doubt it. Overall appears high quality tool that's going to outlast me - for what I paid im very pleased with the item and definitely recommend it for the above reasons
S**.
Capable compass
Great item for someone who can handle the weight. It is extremely well made and functional but it is too large and heavy for me. It is extremely accurate, easy to set width and anchoring point works well
G**M
Well made
Well made compass , feels very sturdy in its construction. Does the job it needs to and at a very good price .
M**Y
Happy Chappy
Excellent just what I needed to help with my drawing
P**S
Wow
Never expected this to be as good as it is . Delivery was good
S**N
Solid compass
Was making a cover for my round window but need a large diameter. This did the job perfectly.
M**A
Very useful tool
I found this very useful for scribing skirting in multiple rooms with undulations across the width. Cutting to the scribe line left a perfectly flush finish. Once set up, it locks in well and had no issues holding a narrow tracer pencil. The generous flat surface on the needle leg makes it easy to stay perfectly on the surface you're scribing, even if you need to adjust position to get around obstacles. Due to the large size of the tool I had to raise my skirting on packers to scribe it as the pencil doesn't reach the floor when resting the compass on the flat scribing edge.
E**S
Mr. Pen thank you so much, I didn't know this would be so special.
This pro compass is the finest quality tool that I have in my collection, it will last me my life and the lives of any other people that have it after I'm dead, this item was a justifiable use of fuel, because it's well made and made without designed obsolescence, unlike the crap tools from the local hardware store, Jab saws, with plastic handles and little vice that break as soon as you use them, and every poorly thought out battery powered junk tool, this tool is fine crafted and a solid tool for the ages.
S**N
A Nice Intermediate Compass
This 12-inch compass serves for making intermediate size circles and arcs in my shop as I have smaller compasses and a large trammel set for the really big stuff. This compass is solidly built and a good deal for the money. The pencil holder accepts standard pencils easily but will not take one of the oblong shaped carpenter's pencils. Not an issue with me. The compass was hard to open initially despite having a sheen of oil on it. I added a single drop of tri-flow lubricant to each side of the hinge and it worked much better (still a little stiff, which is good for holding position before tightening the main screw). If you haven't used a larger compass like this before it may seem awkward but I think it'll work fine for you once you're used to the heft of it. It opens to a 16-inch radius so you can make some pretty big arcs and circles. For radii below about 4-inches it will likely be less awkward to just use a smaller compass. Also nice for use as a divider. Note, though, that the "feet" in this compass are not all that sharp and would not be recommended for metal-working. Overall a nice addition to my shop.
D**Z
Es un buen producto, muy útil.
Es un buen producto, llegó tal cual el modelo mostrado en las fotos, material resitente y de calidad, quizá sea que el me me enviaron tenía un buen tiempo en stock y el material en algunas partes presenta unas pequeñas manchas negruzcas; es el único detalle, no afecta su funcionamiento. Ideal para tener precisión en la medición y el trazo.
江**也
巨大なコンパス、けがきも可能
こんなに大きなコンパスがあったのを知りませんでした。大きな円が描けて便利、簡単に六角形、八角形も描けて最高。 鉄板に直接けがきもできます。
G**N
good solid build
I got sick and tired of fooling with my ancient, grade school geometry tools and figured it was time to upgrade to better compass. This thing met all my expectations in spades. Has a good hefty feel with just the perfect amount of tension between the dividers. Of course, it’s equipped with a lock down screw, but doubt you’ll ever need it. Weighs about 7.7 ounces, like a small can of soup. Quality items may cost a bit more but always pays off eventually. Wished these had been in my tool chest years ago.
Trustpilot
2 weeks ago
3 weeks ago