With rolled edges and an embossed, non-perforated design, these ABA clamps clamp securely and won't damage the hose.Trust these clamps for secure hose connections. All components are Type 316 stainless steel for ultimate corrosion resistance. Unlike other clamp designs that can cut into a hose when tightened, the smooth, unperforated band surface and rolled edges of these clamps prevents hose damage. Band and screw threads are properly pitched, rendering these clamps virtually immune to vibration-caused back-off.ABA original S50 designEmbossed band with rolled edges won't damage hose316 stainless steel componentsWorm-drive design with a one-piece housing1/2" band width (Sizes 7-64)3/8" band width (Sizes 3-5)Meet SAE Standard J1508 Type FE