




📐 Unlock flawless curves and lines—because precision is the new power move.
The Big Horn 19641 Rotape Beam Compass is a professional-grade, pocket-sized tool that merges a measuring tape and pencil scribe to create precise radii from 3.5 inches to 6 feet. Made in the USA with durable metal and plastic, it replaces bulky beam compasses and trammel sets, offering versatile marking on multiple surfaces. Ideal for DIYers and pros alike, it ensures accuracy and convenience in every project.












| Brand | BIG HORN |
| Item Weight | 0.15 Pounds |
| Material | Metal, Plastic |
| Mounting Type | Wall Mount |
| Product Dimensions | 7"L x 4.25"W |
| Special Feature | Portable |
P**W
A must have for ALL diyr's
Better than I expected and it works perfectly. For years I have attempted drawing radius curves onto my projects using the old string method. I am so glad that I finally jumped to the "other" side. This pro pass is accurate, well built and offers perfectly drawn lines. It does not matter if they are straight or radius. It is very easy to use, comes with everything you need and will end the frustration in the shop. It can be used for many things around the house as well.
E**A
Great investment for someone that has many uses for it.
The product overall is great. Not easy to use for some, I can see why the reviews. It takes coordination and practice. I think if it was able to use a regular pencil or pen instead of lead replacements that I’ll have to order from staples or somewhere, I think that it would be the perfect tool for any amateur craftsman or seamstress. I have rigged up a ink pen and ground down a pencil to fit. I still use the brass fitting and lead provided, please note: tighten it so it will not slip while using and don’t press too hard! For me this was a great investment and was extremely excited to use it and will have many uses the years to come:)
A**E
Handy tool but lead slips
I needed to cut a perfect 18” diameter out of wediboard for a mosaic substrate. This tool worked very for my purposes and I am glad I have it now, for cutting any sizes in the future. The reason I gave it 4 stars is I continually had to stop and tighten up the piece of lead as it kept slipping. Also, other reviews have mentioned this specific size of lead is difficult to find once you have run out of the lead that is sent with the set, and only this size lead will fit. So I anticipate possible trouble replacing the lead in the future.
A**R
great product
Great product
J**B
Which break easy. It works
I gave this 3 stars mainly because it got the job done. But it's a very cheap design. For the price I expected it to be made of metal, not plastic. Also, you only get 2 sticks of lead. Which break easy. It works, but not great, and it's too expensive for what it is. I would expect to pay 10-15 dollars for this, not over 30!
B**N
Rotape Tape Compass worked great
I recently bought an antique round table that was 47" and could expand to 69" - I wanted to make a protective cover to place under the tablecloth - this tool made the task of drawing large circles much easier and accurate than any other method I could think of. Highly recommended - I have not seen alternative products on the market for large circles like this.
G**R
Great circle maker
This product works well as intended and is easy to make circles. It arrived with one piece of lead which was broken into 3 smaller pieces. Upon speaking with the seller, they immediately sent out replacements with dozens of sticks of lead! Excellent customer service!
D**.
Great Tool
I am a construction worker . A pipe fabricator there are ,3 sizes of radius markers the starting price for the small one is 30$ and the largest up to 75$ this tool here replaces all of these. Will make up to a 72" circle . Thanks
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