Roto Tape Compass | Rotating Tape Measure Beam Compass, Circle Drawing Tool

Excellent product that is very easy to use, just tap a small finish nail in and your good to go. Sure beats a nail and string any day, holds pencil well. The tape measure portion is pretty accurate, the only variance really come in the size of pencil used, I say always double check that radius you are looking for with another tape measure.

The pins holding the locking mechanism in place broke off and I was forced to use a shim to hold the tape in place so that I can get a proper radius. Very poorly made would not recommend this product to anyone definitely not worth the price. I wouldn’t even give it one star but I was forced to just to submit this review

Worked great and accurate

On the upside this is GREAT for what it does - draw big circle. I build sets for a community theatre and often need to fabricate something with a curved edge or a circle element. This is THE tool for it - way better than a string or drilling a hole in a yard stick/board. Downside: NEEDS TO ALLOW FOR A SCREW/NAIL AS CENTER PIN The center hole is tiny - pencil lead size - and a SEPARATE metal "pin" that you put through this hole to set the center of your circle. It works well, but keeping up with that tiny pin over time is going to be difficult. If the hole where big enough to fit a standard drywall screw, anyone can replace a lost pin easily. FIX THIS AND I WOULD RE-BUY AND GIVE 5 STARS! Warning: YOU MUST NOT RETRACT THE HEAD TOO FAST if you simple release the tape to retract on its own, the extra weight of the head will whip violently enough to bend the tape permanently at the tip (already happened to me) and likely would break it off entirely over time. Maybe the spring is overpowered? Best to retract the tape manually!

This tool really sucks as it came. Sloppy, inaccurate, no pin storage. The tape is also extremely thin (0.08mm vs ~0.12mm on regular tapes) so if you aren't gentle with it and rotate it in the correct direction it will buckle. I would not buy this unless you can fix it. Like others mentioned the hole is way too big (3mm hole for 2mm pin) so the slop is crazy. I 3D printed a bushing to glue in the bottom so the pin locks into the center and only comes out the bottom a bit. The tape measure was off enough to bother me so I designed an adjustable pen holder so you can set it exactly where it should be, or adjust it if you use different sized pens. I also just drilled a small hole as pictured so I can keep the pin with the tool. Files are on printable or makerworld.

I was able to draw the perfect arch for my backdrop. I would recommend this product.

Its feels cheap, only comes with one pin. It will help you in a pinch but not a quality item.

This tool did the trick! Genius

Soo perfect tools with my art project with making circle line, but expensive

Considering how much this costs, I'm very disappointed. I have been searching forever for a compass that can actually draw large circles. It is almost impossible to tighten pencil holder screw, it's extremely hard to turn and actually hurts. I ended up having to use my shirt over my thumb. Not sure how the pin actually works as when you put it in the designated hole, it's not exactly sitting in there tightly. Quite a bit of give. Save your money. 😑

The device is ineffective because there is no way to stop the tape from extending out when drawing the arc. There should be a way to lock the length because while drawing the tape keeps extending due to centrifugal force.