The T-Bolt Hose Clamp From Buyers Products Has A Smooth Inner Band That Will Not Cut The Hose Or Cause It To Bulge, While Allowing Greater Torquing Capability. It Will Assure Equal 360?? Clamping Force Around The Hose For A Tight Connection. The T-Bolt Is Made Out Of Heat-Treated Plated Steel With A Plated Steel Locknut For Durability And Wear-Resistance.