Left soft edge: Built-in smart magnet ensures that the lid stays in place, and the soft edge will not hurt your hands Upgrade: Opens a wide variety of sizes of jar lids, from 1.5" to 4" in diameter - made of stronger and durable internal materials. No twisting, no pulling, no pain - best kitchen tool for women, chefs, seniors and people with arthritis Energy efficient: this jar opener electric uses very little energy, opens the can very quickly. Easy to use: place it on the lid. It opens your jars automatically with the press of a button. The lid is held simultaneously with a magnet to prevent mess. Best quality: Our products are made with good quality materials. Don't worry. We improve your life experience. Note: The data is all manually measured, please allow 1-3cm error due to differences in light and display, there may be differences in color, please refer to the actual item received.