The Screw Set Recessed Into A Round Trunnion For Easy Installation And Has A Guide To Prevent The Fastener From Damaging Hoses. Suitable For All Plastic And Rubber Hoses. The Standard Uniclip Steel Clamp Is Constructed From A 400 Series Steel Bond With Zinc Plated Carbon Steel Set Screw And Trunnions. Ideal For Agricultural, Industrial Or Heavy Vehicle Applications.