motorcycle carb holding tool will fit most carburetors from 28mm to 44 mm with these adapters this tool allows you to work on the card and spin it 360° and hold it there. Adapters for the small and big end are fuel impervious so will not wear out it is designed to go in vice but will also come with a table mounted base that you can either clamp or screw down to your work bench carb small and big in adapters come in different colors also will work on keihin/mukuni/fcr/ and more short video to come us patent # 63/833.159 will ship and accept venmo/zelle/paypal