The best quality SCS in the world! Made in USA ! That's why SCS comp was the first to come. running. SCS has a fifth screw that is used to expand the SCSka. This makes disassembly and assembly of the SCS easy and without the need for a five or five washer. SCS is only for steel handlebars. (for 32mm diameters). The SCS also has an offset split (the notch in the SCS is not in the center, but at the side). This makes the screw threads longer and more resistant to tearing.