Mr. Pen- Professional Metal Compass with Wheel, Lock and Extension Bar for Geometry, Drafting, Math, Drawing, Compass for Geometry, Tool for Drawing Circles, Drawing Compass, Compass Drawing Tool

I have been a user of Staedtler products since the 80's. They were always the "go to" products even when it took a bit of work to afford them. I needed to replace a compass part as I lost the wheel and screw; since you can't just buy them I tried out the lower price Mr. Pen set.Incredible! I am stunned! They ARE heavy so be advised their weight may get on our hands after all day of drafting. My usage now is for mapping and traveling so I need something more of a "hard to destroy" category even if it adds weight. Would prefer something without the weight and with the "non-destroyable" but titanium compass sets for a good price don't seem a thing.The set is great. It will now be my travel set.THE ONLY PROBLEM - or "oddity" in this case - is the spare set of "parts" they put into the kit. OK, spare hard points? Check - perfect. Spare wheels? Check - perfect. Spare screws? NO SPARE SCREWS! Changes are if you have them in a map case and lose the wheel you will lose the screw! Why not include a couple screws? Remove one wheel and add three screws? THAT was my only complaint and obviously not going to lose t star for it! Just odd. Really, just plain odd.

Compass works great. Good quality for the price.

I needed a compass with an extension arm, but this'll be a good backup because the extwnsion arm works with my Steadler Compass. However, the Mr. Pen compass seems to be a good product overall despite some janky feel to the gear mechanism. Thus, you do need some WD-40 for the all metal compass design. Due to needing WD-40 to make it smooth, it may be common I'll need to wash my hands after every use. But I hope this isn't an issue when the lubricant settles.Some other info on the product:- All metal will likely be more durable. BUT, how it is made makes it janky and I need WD-40.- Minimum range for the extender, I got it at 129mm (12.9cm).- Maximum range for the extender, I got it at 270mm (27cm).- Max range for No-Extender, I got it at 165mm (16.5cm).- After WD-40 on the gear mechanism, aquiring the measurement off a ruler for 80mm (8cm) is accurate for replicating the measurement.Final thoughts, It's an overall good product. But you do need WD-40 to make it smooth enough for quick and accurate measurement replication. I was concerned about the extender arm leaving a dead zone gap between non-extension and extended. But there seems to be no real worry after I did the tests.Attached to this review l, you can see the extender arm and measurement replication tests I've done.

So I started drawing Mandalas and Zentangles this is the third Compass I have bought. It is however the best so far it's heavier well put together and intuitive to use. It does take some getting used to especially the extender and pen attachments, but once you do it's smooth sailing.

I just received this and it looks to be well made. It is missing the extension beam, which is a bit disappointing. The seller then contacted me and offered a full refund. I turned it down as it seemed excessive as the rest of the item was completely fine. They refunded me anyway. That's above and beyond.

Me encanta es el único compás totalmente metálico, pieza por pieza

Great compass. Feels nice to hold and work with. Easy to adjust. Feels so much better than other brands that are double the cost and 90% plastic! I’m very happy with my purchase. Highly recommend! Don’t spend more, just get this one. You wont regret it.

For my needs it did not suit and I have used compass devices for over 30 years. Not happy with this choice.. I have repeatedly kept doing my best to make this work for my needs for a few weeks or more but it’s not able to deliver what I need.Maybe I just made the wrong choice.Problems: Sloppy mechanisms that hold the compass in place on your setting will fail up to 1.5 mm. I can set it and then give it a very light pressure and it clicks to something within that range of error. Significant for me. Maybe not for you.Also, the clasping mechanism are with issues. Either the pivot is too hard to pull back out or won’t stay in place. Big negative.I have tried the options to add a pen and the flaw only is maximized.It’s about a C in grade. I won’t give it anything more and I feel I am being generous.Continues to get more inaccurate and I have tried to figure it out but I simply know what simple is and it’s a simple design flaw or manufacturing error. .The thread ratio is fine but the threads are undersized so they have sloppy motion under the slightest pressure as you turn the compass. So it’s no go for me. Going into the junk drawer and I will seek out better alternatives as this was very frustrating.I will take two stars off for those issues and I haven’t even tried the other functions of it because if it isn’t working in its fundamental design then it wins be expandable in its aspects.