1 9/16"- 2 1/2" Premium Hose Clamps have a 300 series stainless steel 1/2" band and housing are matched with a 300 series stainless steel 5/16" hex head screw. This clamp is highly corrosion resistant, well suited for marine applications and is low in magnetic permeability. Rounded edges to protect the hose. Efficient three-piece construction. Screws feature deep slots for quick installation. Premium Hose Clamps have 100% interlock construction features: one piece housing which directly locks into the band and spot weld free design. Easily installed with screwdriver, nut driver or socket wrench. Meets or exceeds SAE torque specifications.