Like many woodworkers, I store finishes in appropriately sized jars to prevent them from skinning over in a partially empty can. The problem is that no matter how well I wipe the rim of the jar before closing it, the lid often sticks stubbornly shut afterward. To solve the problem, I designed this jar opener that mounts to the underside of a cabinet, allowing me to twist the jar with both hands while the jig holds the lid firmly in place. It works so well that I made a second one for the kitchen too.
To make the jig, use 2×6 lumber sized to fit under a standard-depth wall cabinet. Shorten a hacksaw blade to fit by scoring it with an abrasive wheel and snapping off the excess. Drill holes in the blade to mount it to the wood strip with #10 panhead screws, cantilevering the blade 1⁄8" off the edge.
