Homelite Needle Bearing part# UPO6815 is a clutch drum/sprocket bearing that was used on the following Homelite Chainsaw models; 330, 410, VI123, 450, 550, 150, 150W, Super XL 925, Super EZAO, Super EZ, 360, XL12, and 245. Even if your model is listed here, all Homelite parts are UT and/or serial number specific. Please refer to a parts breakdown for your particular model and UT number to assure that this is the correct part for your machine before you order.