Aluminum and steel dipstick requires no tools. Machined aluminum head seals against engine case with oring. Approximately 180mm fits big twin sport bikes with broad sumps such Daytona RS, 1100 Sport Injected, V11 Sport and V11 LeMans and variants, Griso 2007-2013, Stelvio, Sport 1200. Please check your dipstick length prior to ordering. 20mm plug with 1.50 thread pitch common to many Guzzis.