This clutch hub puller / extractor is a for removing your primary, pulling your clutch basket. You thread it on then tighten the bolt and give it a smart rap with a hammer to pull the clutch hub from it's taper. This tool is specially made for all pre-unit and unit 650 and 750 cc Triumphs such as TR6, TR7, T110, T120 Bonneville, Trophy, Tiger etc and also BSA A50 and A65 motorcycles from 1967 and up. This clutch hub puller also fits Triumph Daytona 500cc motorcycles up to 1974. This is a replacement for factory tool OEM # 61-7014. 1 inch 20 TPI threads. Made in the USA.