NOTES1. All Knobs (except molded plastic & EVA) are made with 6061 Aluminum.2. Molded Plastic Knob has a 9 degree off-set; bearing is NOT included & NOT needed!3. All Round Knobs contain 2 ball bearings. 4. All Aluminum T-Bars have an 18 degree off-set and contain 2 ball bearings in the stem.Mounting Screws May Be LEFT HANDED!If Needed, Installation Notes Available Upon RequestSales Tax: CA Residents Pay Sales Tax.