Description Brand new gasket set and crankshaft seals to rebuild your saw. Fits Stihl concrete saws, models TS410 and TS420. High quality set made by Hyway. We offer a 90 day warranty against manufacturer defects on all parts we sell, buy with confidence! Wolf Creek Saw Shop is a proud U.S. seller, we ship within 1 day of receiving payment, and you will get your parts quickly!