You’ve found a heavy, pointed brass weight with a string attached in your dad’s old toolbox. That tool is called a plumb bob.😱Read it in the first comment⤵️

A plumb bob is used in construction and carpentry to establish a true vertical line. Its simple design—just a weighted point suspended from a string—allows gravity to do the work with great precision.

But beyond its practical use, your dad’s plumb bob is more than just a tool. It’s a small piece of his working life—a reminder of the projects he built, the problems he solved, and the care he put into his craft. Now, it’s something you can preserve, display, or even repurpose.