Non-slip material grips the jar tightly allowing you to get the proper amount of torque to open it Holds bottles or jars from 1" to over 4" in diameter allowing you to open with one hand Device is great for those with a weak grip or those with fine motor movement issues Can be used with one hand which makes it perfect for any kitchen or for anybody who has trouble opening jars Rubber lid opener is latex free which is it perfect for all users who would normally have to worry about a latex allergy