This handy Black & Decker Jar Opener has a collapsible design that adjusts to fit almost any size jar, from large to small. To use the Black & Decker Jar Opener, lift its handle and place a jar on the turntable. Lower the upper body to rest on top of the jar, and then press and hold the on/off button until the lid is loosened. That’s it! When you remove the jar, you’ll easily be able to get that lid off and enjoy the contents.