These worm drive hose clamps feature stainless steel straps, housings and screws for durability, rust and corrosion resistance. Worm gear mechanism adjusts clamp diameter for precise application of sealing pressure. Clamps are elastic and malleable, with a variety of adjustable sizes to meet different needs, 8-12 mm, 13-19 mm, 16-25 mm, 21-38 mm, 25-44 mm, 7 of each size, 35 in total. Torsion balance ring, which can be locked firmly and has a wide Setting range. Wrapping tape protects the surface of the flexible hose from shearing during installation. The hose clamps have aging and exterior fatigue resistant plastic handles that can be easily hand tightened and removed without any tools. Common uses for hose clamps include securing hoses in automotive systems and line clamps in household plumbing systems, such as connecting and securing hoses for gas, fuel, air, water, fuel, PVC or silicone, etc. It's an essential item in everyone's toolbox. Packing List: 35 * clamps We only sell clamps, not other items in the picture. Due to the differences between different monitors, the pictures may not reflect the actual color of the item.Due to manual measurement, please allow slight size errors.