Easy to Use: Just use a screwdriver to tighten or loosen the screw of the hose clamp, then adjust it to your desired size and fasten the hose clamp in place. Including 30PCS 1/4-7/16"(6-12mm),30PCS 3/8-5/8"(10-16mm),30PCS 1/2-3/4"(13-19mm),23PCS 5/8-1"(16-25mm),20PCS 3/4-1-1/8"(19-29mm),20PCS 3/4-1-1/4"(18-32mm),8PCS 13/16-1-1/2"(21-38mm),5PCS 1-2"(27-51mm) with socket wrench and screwdriver;fuel line clamp Including 34PCS 8 sizes 5/16"-13/32", 7/16"-1/2", 1/2"-9/16", 9/16"-5/8", 5/8"-23/32" ,23/32" -25/32" ,25/32" -13/15" ,13/15"-15/16".
