Taytools 468310 Large Adjustable Trammel Head Set Beam Compass, Pencil Holders, Hardened Points

These are substantial, flexible in use of ruler and very easy to change in length of radii.

I attached these to a 1x2 piece of wood so I can draw perfect circles in a piece of wood. Then I cut the wood using a drill and jigsaw. Worked like a charm. I hate using a rope around a nail. This is way more civilized. The quality of the product is very high. Its a sturdy metal unit, well-painted. A couple of reviewers mentioned that it doesnt look pretty, but I actually really like the retro industrial feel. The carbon tips are also really sharp, so it wont slip in the middle of a job. Worth every penny!

These make a solid beam compass as big or small as you want. Pencil fits in perfectly, and they have a good weight to them

Well made

I have been making large shop drawings with trammel points for more than 50 years. These are the biggest, strongest, heaviest (cast iron), best designed trammel points that I have ever used. Designed for clamping on wood or metal bars of any length. They are built like a mack truck. Great for heavy hard use on large drawings, and job site layouts. Holds pencil firmly and in multiple directions. Unbelievable quality. Great price. All other trammels are toys by comparison.