These hose clamps are made from high quality 304 stainless steel, rustproof and long service life The surfaces are well polished and the edges are also smooth, so they will not scratch or harm hoses There are 8 kinds of hose clamps in different adjustable diameters that you can choose Convenient to install or remove by using either a slot screwdriver or a hex wrench Fit for thin wall hose in small sizes such as air hose, water pipe, fuel hose, silicone hose, etc, Manufacturer: FTVOGUE