Brand metal motorcycle/off-road vehicle/ATV/motorboat accessory.Includes one set of components as shown in product images.Compatible with Massimo MSU500, MSU700, Alligator 500, Alligator 700, Challenger 550, Challenger 700, and Challenger 750.Also fits Hisun HS500 (2014–2017), HS700 (2014–2017), HS750 (2016–2017), MSU500, MSU700, UTV500, UTV700; Bennche Bighorn 500 (2010–2017), Bighorn 700 (2010–2017); Challenger 500 (2015–2017), Challenger 700 (2015–2016), Challenger 750 (2016–2017); Supermach UTV500 (2011), UTV700 (2011); Outfitter 500 (2012–2014), Outfitter 700 (2012–2014); Excalibur UTV500, UTV700; Qlink Rodeo 500 (2008–2013), Rodeo 700 (2008–2013), FrontRunner 500, FrontRunner 700; Menards YS500, YS700.This is a one-way starter clutch bearing replacement part.Please verify compatibility with your specific model year before purchase.