Dual throttle cable internal throttle; patented & made by Ost Freesen Choppers . Complete with throttle and idle cable and a special external cable adjuster. Manufactured from high quality corrosion resistant V4A stainless steel and anodized aluminum. Precision tolerance engineering with 4 roller and 2 needle bearings offers a maintenance free system with light and smooth action. Compatible with all regular in-bar turn signals. Note: On 1" bars two left side handlebar grips are required with identical 1" inside diameter. On 22mm bars one 22mm ID and one 1" (25.4mm) ID grip must be used. Note: Can be used in 1" and 22mm handlebars. Note: See 947970 for the optional OFC cutting & drilling tool to ease installation. Note: With approval. Check your local MCS dealer or the MCS sales department for exact type of approval and validity on bike model and years on the test report.