Triumph Twins Clutch Locking Service Tool. With this tool there is no need to modify old clutch plates and spending hours making your own! Makes getting your clutch hub nut off easy! It’s affordable, ships free, and saves you time! Made of steel and comes with a bright plated finish! Fits Triumph Twins (Unit & Pre-Unit) 350, 500, 650 & 750 models (3TA, 5TA, T120, Bonneville, T140, T110, 6T, etc) from 1945-1983. Also fits BSA 500 & 650 Twins (Lightning, Rocket, Thunderbolt, Hornet, etc) equipped with 3 spring clutches & 4 spring clutches from 1962-1972. Please refer to your parts catalog for proper fitment.*****Please note that this tool is not compatible with Triumph & BSA single cylinder motorcycles. Styling of tool may vary due to different manufactures.*****Made in TaiwanO.E.M Part number is 61-3768 or 61-7018