Open tight, stubborn lids with the touch of a button! one touch™ jar opener eliminates all the straining, twisting and banging—just position the expandable clamps onto lid, push the button and the jar opens—hands free! Patented technology lets you open jars with 1" to 4" diameter lids. Compact design stores in drawer. Uses 2 AA batteries (not incl.). 6-1/2" L.