UMM-USA 3D Center Locating Tool Jig
By Matt Bittner
UMM's 3D Center Locating Tool Jig is a small tool that will help find the center of most parts, round or square. You use it by sliding the part you want to mark the center of into the 90 degree end and draw a line along the guide. Then you rotate the part and repeat the marking. Several marks will intersect at the center of the piece.
You can see in the photos that I marked the center of a top from a water bottle.
If you need to find the center of most any part then UMM's 3D Center Locating Tool Jig will help you do that. My thanks to UMM-USA for supplying the Jig.