1 Pack Precise Contour Scribe Tool with 2 Pencil, Upgrade Contour Measuring Tool with Adjustable Lock for Woodworking Finish Carpenter, DIY Handyman, Construction

I read some other reviews complaining about the slide being "up side down" or the end had fallen off. I suspect the real problem is just the lack of instructions. I can't see any way the slide can be upside down because it will work fine either way. But, if you need to use a distance that requires the pen to be closer to the ball bearing end or the fine point end, you can just pull the end off and reverse the slide. that brings up the point that one end is pointed for curves with fine points, and the other has a ball bearing on it for broader curves. As far as the ball bearing goes, some have complained that the bearing doesn't always turn. --I can't imagine this making any difference; it will still trace the same curve. I'd say it's a great tool, well worth the price. But if you hate plastic, it would be fairly easy to make your own out of wood or aluminum.

The bearing could spin better, but for the price it does the job.

Cheaply made. Buy something else. Not well constructed and a P.O.S.

Tool was assembled incorrectly. Center slide was installed upside down. Not accustomed to having to work on a new tool before using it.

I found this too, very helpful and getting accurate measurements

Let me transfer irregular wall lines to drywall

Laminate floor installation.

I took mine out of the box and the end fell off - I put end back on and sent it back - never used it.