The Husqvarna 503861703 is a genuine OEM clutch drum designed for Husqvarna chainsaws. This essential component features a 3/8-inch pitch (9.525 mm) and 7 teeth, ensuring optimal power transfer and smooth operation. It is compatible with a wide range of Husqvarna chainsaw models, including the 340, 345, 350, 351, 353, 445, 450, 450E, 450 Rancher, 455, 455E, 455 Rancher, 460, 460 Rancher, 461, 545, 550XP, 550XP Mark II, 550XP TrioBrake, 555, 560XP, and 560XP TrioBrake series. Replacing a worn clutch drum helps maintain cutting performance and extends the lifespan of your chainsaw.