Pencil Compass 12 inch, Precision Woodworking Compass with Wing Divider and Pencil Holder, Metal Compass Ideal for Geometry Drafting and Technical Drawing, Engineering and More

What a great compass! It came with a metal ruler, 2 pencils, a pencil sharpener, and a carrying case. Very well made, heavy steel. The locking knob holds tight. A great value. Glad I bought this one.

I purchased the 16" version. It very adequate for laying out arcs for reference points in my paintings and geometry projects. I am pleased with the overall quality of this compass. It sturdily made and is robust at the hinge point. No wobble. The pencil mount is OK. The finish is adequate for its intended use. The two sharpened points on the legs are ideal for long divider measurements and will be handy in the wood shop with pencil removed. Having the 16" compass now is persuading me to get the 12" compass as well to fill in the middle ground between this quite large compass and standard draftsmen compasses found at office supply stores. My "accuracy" score of 4 stars is reflected only by the use of a standard pencil as the marking lead, and is only as accurate as the user. For my purposes it is very good.

I purchased this compass so that I could make full scale 22 inch diameter drawings of a composite flywheel I am designing in order to instruct the technicians who are building the flywheel in the location and orientation of the composite fibers. This project involved making numerous concentric circles on large sheets of vellum or bond paper with accurately spaced distance between each circle. I tried several other compasses with clip-on extensions and they proved too rickety to draw accurate large circles. This compass is exceedingly stiff and strong. Once you set the radius desired, it is not moving and the only inaccuracy is in how the pencil lead wears down. I tried to use a drawing pen but found that it was too sensitive to the angle of the compass arm with respect to the paper surface, and would skip irritatingly. As long as you keep your pencil sharp and tightly clamped in the holder, you can make as many large circles as you like with excellent accuracy.

Being Chinese made you can only expect so good of quality. The entire thing has fairly rough grinding marks and 4 edges had burrs that were sharp enough that I had to file them smooth. That being said, it really doesn't it prevent it from performing adequately. The pivot is good and tight and all the threads work well. It seems like it will work the way it should.

Holy smokes - this thing feels like it was made in the 30's and will last 100 years! Heavy guage steel, quality manufacturing. It is heavy in the hand. Not cheaply made. It's large - not best for tight spaces - but otherwise buy this one and use it for life.

This compass works perfect for drafting your own stencils and or shaping mendela dot art. A very durable and well made product that offers ease of movement and variable size pencils, pens and painting accessories I'm very happy with this compass and recommend it to my fellow crafters.

I bought this to help cut round circles in lexan sheet, and it worked great. They have a very snug hinge so there's no slop, and the thumb screw helps lock it into the size you need.

I was surprised how sturdy this thing is. And having the locking screw makes sure the adjustment will not change.

Buen producto

Arrived broken

Did the job.

Only thing I would change is to make the pen holder a bit bigger. Would love to use a sharpy in it.

There was no pencil attachment with the item...this was why I wanted it. See photo...no provision to attach a pencil.. as per every photo on Amazon... I'm not happy