The Oregon 100757 is a high-quality clutch drum bearing designed for optimal performance in Husqvarna and Jonsered chainsaws. This genuine Oregon part ensures smooth operation of the clutch drum, reducing friction and wear. It is a direct replacement for Husqvarna OEM part number 503250801 and fits a wide range of professional chainsaw models including Husqvarna 257, 262, 261, 268, 272, 362, 365, 371, 372, 385, 390, 394, 395, 480, 570, 575, 576, and Jonsered 2063, 2065, 2071, 2163, 2165, 2171, 625, 630, 670.