Adjustable Design Can opener adjusts to fit most sizes, save time and effort. Suitable for jars with lids diameter up to 4.7 inches/12cm. Anti-slip Design There is a screw design on the inside of the handle of the tin opener. There are gears at the opening of the lid, which increases the friction and reduces the risk of use. Humanized Handle Master opener has an ergonomic, effort-saving handle design and overall length 19.5cm. Easy to open cover and has comfortable grip, can hold for a long time without getting tired. Easy to Use Just put the main master opener on the top of the lid, adjust it to a right size, align it with the card slot, and then clamp it. When you ready to rotate it, hold the bottle, the cover can be removed. High-quality Material All stainless steel adjustable design bottle opener, suitable for people with weak hand strength, strong and durable. They are lightweight and easy to carry.