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Ideal for artists, architects, engineers, educators, craftspeople, woodworkers, quilters, and pattern makers, the Koala Tools Ring Ruler 360 is the first size-adjustable, circular ruler. It makes drawing and measuring circles and arcs a much simpler and more efficient experience by eliminating the cumbersome pivot-point system.
Expanding and contracting the Ring Ruler 360 feels natural and ergonomic. It's quicker and safer than using a needle compass, and it also provides the more useful circular metrics of diameter and arc length/circumference.
One of the best features of the Ring Ruler 360 is its simplicity. This makes it a great learning tool for students — especially those too young to handle a compass.
The Koala Tools Ring Ruler 360 is offered in your choice of US standard and metric scales.
® Koala Tools is a registered trademark.™ Ring Ruler 360 is a trademark.
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(based on 3 reviews)
of respondents would recommend this to a friend.
Reviewed by 3 customers
Displaying reviews 1-3
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By SAAAABATOOTH BOMBASTIC
from ISLAND OF RASTIFAR
Comments about Koala Tools Ring Ruler 360:
WORKS FOR LARGE CIRCLES,ALSO COMES APART TO EASY
Bottom Line No, I would not recommend this to a friend
Merchant response: Thank you for your review. Please know that if you decide this ruler won't meet your needs, we'll be happy to work with you on a return or exchange. Just call 1-800-723-2787 to speak to a Customer Care Agent.
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(2 of 2 customers found this review helpful)
Nice tool can be used for various things
from Houston, TX
Intrigued by the concept of tracing out circles and curves by hand, I had to try it out. So first off, it's really easy to use, but does take some practice in how it is held down with your 'non-drawing' hand. You should open up your hand and support it from at least 2 spread out points to keep it from moving, just as the guy in the video does. The circles it produces are not perfect, but I'm not an engineer and it suits my purposes just fine. I am an illustrator and it helps me to draw fast curved lines in ink. As many artists know, a slow line in ink can be squiggly or too fat, or just not show the streamlined lightness that you want to convey. In the same way that a straightedge will give you a perfectly toned line, well this ring ruler does that for circles and curves.
Bottom Line Yes, I would recommend this to a friend
Does what it says, but not very well...
By Van D
from Asheville, NC
It can be used for what it shows in the company's instructional video, but the QUALITY of the circles it produces is mediocre. I found myself wondering how many takes had to be used, and how much practice the person had to go through to actually get straight, non-ovoid circles out of this tool. The plastic walls of the ring "give" too easily to make dependable, concentric circles; and the smaller the circumference, the harder it is to keep the drawn image from looking like an egg.I can't attest to the accuracy of the ruler, or using it to measure circles, as I really didn't buy it for that purpose.Suitable for a child's replacement for a compass, but not for jobs where accuracy and dependable repetition are needed. Stick to a compass or templates.
Merchant response: We are sorry to hear you did not have a satisfying experience with this product. Please know that if you are not completely satisfied with the quality of the merchandise you receive, you are entitled to a full replacement or refund. We ask that you contact our Customer Care Center at 800-723-2787 within 30 days so that the exchange, refund, or credit transaction can be arranged to your satisfaction.
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