It's like having 3 hands. Two of yours and one with the strength of 10. Just attach the Un-Skru Jar Opener to the underside of any table, counter, cabinet, shelf or bar and easily handle any screw lid from 3/8in (.95 cm) to 3 3/8in (8.6 cm) in diameter. No adjustments are required and it can be operated with one hand (although with some jars we use two hands).
The Un-Skru is made of molded nylon resin and has a steel gripper. It comes with two mounting screws and is ready for installation. Measures 6 x 3 1/2 x 5/8 (15.2 x 8.9 x 1.6 cm).