【Wide range of applications】 Each pack has 9 piece rubber ring, Each Piece has two sizes for use, total 18 kinds of different size: (Diameter)8-16mm, 22-32mm, 25-28mm, 26-36mm, 41-47mm, 50-53mm, 56-65mm, 60-70mm, 75-83mm | 【Strong and sturdy】Made of high-quality rubber, durable and stable, high friction and good elasticity | 【Easy to Use】 Specially designed to detach lens pressing ring and remove lens front retaining ring, excellent for removing stubborn filters from lenses, just slide the tool over the lens and twist to loosen and remove it. | 【Protect Your Lens】 Each surface has the hollow design ,avoid scratches when remove lens. Very efficient minimal force is used with no risk to the glass. | 【Perfect for photographers】Nice tools for photographers to repair lens.Can save you money on repairs and replacements by allowing you to fix the lens on your own without having to pay for expensive repairs or replacements.