Opening the jelly jar is a breeze with Harold Import's 1-4 inch Jar Vise. Simply slip your screw-top jar into the V-shaped metal teeth of the jar vise and twist. This handy tool mounts underneath your cabinets for easy access. Use it to easily open screw-top jars ranging from 1 to 4 inch in diameter. With Harold Import's 1-4 inch Jar Vise, open your jars in one smooth motion with a tool that gives you all the leverage you need.