1. Has an improved torque power which can easily open the tightest and toughest lids of any jars. 2.AUTOMATIC SYSTEM It can open jar lids automatically without any unnecessary effort. To use it, you need only set it down over the jar, press the button, and watch the vice grips hold the unit in place and twist off the jar lid. 3.FITS ANY JAR This robotic jar opener is constructed with 2 large twisting vice grips that can hold 1.2 to 3.5 inches diameter of lids, making it compatible to different sizes and types of jars and jar lids. 4.PERFECT FOR EVERYONE The design of this jar opener focuses on making life easier for people with limited grip strength such as kids, elderly and people with arthritis. 5.EASY STORAGE For compact storage, press the button to open a jar on the unit. This will reset the arms to their innermost position. Doing so makes the small unit even smaller.