Such an interesting idea for old mason jars and fall leaves. Temporary adhere the leaves to the jar and paint over them with chalkboard paint and then remove to reveal the leaf shape.Fall leaves on a painted mason jar
Spin two nuts onto the bolt, tightening them against each other. Then chuck the bolt into the drill and hold a hacksaw blade against the spinning bolt. The nuts help to steady the blade and clean off burrs when you unscrew them.