Four-piece construction and 100% mechanical interlock for added strength and torque capability.Combination 5/16" hexagon, deep slot screw head for easy installation.Easily tighten clamp with a screwdriver, nut driver, or socket wrench.Wide 9/16" band gives 12½% more compression than ½" band.Inner-liner band eliminates hose cover extrusion.One-piece band and liner.Packaging: 10 per box.