Professional Metal Compass with Wheel and Lock for Geometry, Compass Geometry Tool, Drawing Compass, Drafting Compass, Math Compass, Geometry Compass, Compass Drawing Tool, Compass Math

1. Was concerned when I read some reviews that said some screws were stripped. Actually they are NOT stripped, but free wheeling. In order to tighten, place a finger on the UNDERSIDE of the screw when tightening. Problem solved 2. I was concerned when I read that the protractor "wobbled" when the extension was attached. Only if it is NOT fully inserted into the slot and SECURED by the screw, If the screw is not secured by the above method, then it will wobble, otherwise NO problem. Works like a charm! 3. Only complaint is NOT enough information provided by the supplier. The "cute" included mustache isn't so cute when you have to solve the problems yourself and the "cute" video FAILS !

This thing is way beyond what I expected! I needed a compass that made a10" circle for a mask pattern I wanted to try. The first one I bought, the description said 9". Not really what I was looking for, but I also didn't want to pay a lot, as I might use it once, not like the pattern, and never use it again The description said 9", the packaging said 8", and it only open enough to make a 7" circle. I contacted the seller, as they asked in the packaging. They immediately refunded my money. But I still needed a compass. I found one that said it made a 10" circle and had a video. It was from the same company as the one I'd just had refunded, so I felt safe giving them another shot. Wow. This thing. I'm not a professional... anything, but this compass is definitely professional quality. It's got some actual heft to it. It is just way beyond what I was expecting. Plus, it cost less than the others that claimed to be what I was looking for. I would recommend this to anyone who needed a compass, large or small. And you can't beat the customer service!!

I mainly got this particular compass as it had the extension arm to draw circles up 24". It is pretty easy to use and comes with several extra leads and metal points. It does take some fiddling to get it up to the 12" radius (for which I subtracted 1 star), but it is surprisingly sturdy despite the fact that the compass is maximally stretched out at that point. And it includes another tip that lets you put in a regular pencil if you prefer that over the lead. Another nice thing is the quick release lever that can spread the compass quickly with out have to use the thumb screw to adjust the arms. The thumb screw, can then be used as more of a fine tuning device. Great so far.

Update: I contacted the seller and his response was super fast and sorted out the problem right away. We now have a compass that works well and that one must have been a one off one that has a problem. My son loves it and the feature where you push both bottoms to expand it quickly is super useful when he is doing his geometry homework. That way, he doesn’t have waste time using the small dial to expand the leg or reduce the size. ————- (Old review) I was excited to get this for my son for his Geometry class. So was he. All are great such as refills, extra screws, the little metal plate as a screw driver to tighten the screw for the leg that bends, additional leg to draw a big circle (although this isn't necessary for his class), but one slight oversight which is annoying to use is the screw that tightens the legs from bending. The screw head is so shallow, I cannot tighten it before threading the screw. Needless to say that I cannot tighten it. So, when my son uses it, it kept bending when he's putting his point down on the paper firmly so that the compass won't slip off. I told him to grab the bottom part of the leg while he is pushing down on it. Contemplating on returning it and see if we can get the proper one to tighten the legs. But the inconvenience of it... sigh... If they could just replace the screw (if that screw can be replaced), that would be perfect. All other features function fine and would have been a great compass with 5 stars.

It feels very sturdy, I've no complaint with the quality of the make. I'm not a professional, I bought this for at projects, so maybe I just don't have the knack of this but no matter how I try to keep the legs straight, those two lower hinges give too easily. I tried tightening them and the screws wouldn't budge. It takes too much time resetting the legs, having to hold them at the base carefully so they don't give in, I've tried everything. I took a drafting class in high school, I'm not totally unfamiliar with how to use a compass. If you're not a professional that needs and knows how to handle all these extra joints, don't bother with this one. Too much trouble.

Everything is good. Comes with replacement parts. The only caution I would have is keep an eye on the two joints (see green arrows). They don't lock in place so make sure they are in the correct position when you use the compass. They aren't actually loose, but you might accidentally jostle a joint open while using and that would compromise the work. Just note that the joint can move if you're careless. The ends can only swing in slightly and never out so as long as you keep some tension on the spread you'll have no problem. (see follow up comment)

あちこち曲がってたり、作りが雑で使いもんになんねー

Problem with many compasses is that the radius can vary during use, with the slightest bump, or uneven pressure when drawing. The Mr Pen compass is sturdy, has a sharp point and almost every movable piece can be easily secured by tightening the various screws. The only bits I couldn’t tighten, I immobilised with a little cellophane tape or electrical tape. I can now draw at least 20 circles with the same radius, without checking and readjusting the radius for each circular arc. If you’ve ever has trouble using the expensive brand-name compasses, you might be pleasantly surprised how the Mr Pen compass is *much* more reliable. I heartily recommend this compass. The only downside is the international freight cost which more than doubled the price - even with Amazon Prime - the cost is disguised in the cost of the compass, and not separately itemised. In the US, you’ll get one 1/3 of the price I paid.

It works great for drawing.

Bien

Muy bueno, estudio arquitectura y me ha funcionado para todo