Fits most jars with diameter from 2.3cm to 10cm / 2.5cm to 10cm. The steel tooth on the clamp grab the edges of the stubborn lid tightly & hold it in place when you are twisting. The position of the buckle can be adjusted, and you can adjust it according to the size of the lid. The handle is not-slip and has a texture and a comfortable grip. It is easy and effortless, does not damage the lid, suitable for the elderly and people with weak hand strength. Just takes one simple twists to open the bottle. Saving your labor and time. Features: Fits most jars with diameter from 2.3cm to 10cm / 2.5cm to 10cm. The steel tooth on the clamp grab the edges of the stubborn lid tightly & hold it in place when you are twisting. The position of the buckle can be adjusted, and you can adjust it according to the size of the lid. The handle is not-slip and has a texture and a comfortable grip. It is easy and effortless, does not damage the lid, suitable for the elderly and people with weak hand strength. Specifications: Handle material: PP(2.5cm to 10cm) , wooden(2.3cm to 10cm) (optional) Material: Stainless Steel Item size: wooden: 86 * 64 * 42mm / 3.4 * 2.5 * 1.7in PP: 87 * 72 * 42mm / 3.4 * 2.8 * 1.7in Item weight: wooden: 114.5g / 4.0ounce PP: 123g / 4.3ounce Package size: 92 * 75 * 45mm / 3.6 * 3.0 * 1.8in Package weight: wooden: 129g / 4.6ounce PP: 137g / 4.8ounce Packing List: 1 * Can Opener