Clamp cap tightly & without scratches: The Can opener includes three metal wheels to fix the cap to prevent slipping. The conventional sharp teeth are replaced by metal wheels with grooves, to protect the cap and reduce scratches, so you no longer have to worry about the bottle cap scratching your hands. Easier to open bottles: The bottle opener has a 4.2in ABS handle that, when combined with the leverage principle, makes opening the bottle easier. It is especially beneficial to the elderly with arthritis, as well as middle-aged people with hand injuries and children. Adjustable jar lid opener: To accommodate different-sized cans, the distance between the three gears can be adjusted clockwise (smaller) or counterclockwise (larger). Easy to open soda ring pull tabs and beer cans with lids that and within 1-3in the lid what water bottles, soft drink bottles. Easy-to-use jar gripper: Just follow the steps below to use it: (a)Turn the top knob the counterclockwise to adjust to the most size. (b)Put the adjusted bottle opener on the bottle cap. (c)Turn the top knob the clockwise to limit, and clamp your bottle cap. (d) Hold the ABS Handle and turn it to the right.