This durable worm drive gear works seamlessly with Whirlpool and Kitchen-Aid mixers. Designed to last for years of heavy use, it features a robust metal construction and precision cut teeth that maintain torque to power through any mixing task. Whether you're kneading bread dough, whipping egg whites, or making cookies, this replacement gear ensures your mixer performs at its best. It fits models 3K45SS, 3K5SS, 3KSM150PSTBW0, 3KSM150PSTCB0, 3KSM150PSTOB0, 4K45SS, and 4K45SS7OB0 to replace worn or damaged gears. Backed by Ohoho's satisfaction guarantee, you can feel confident this gear will keep your mixer in top working condition for seasons of baking to come.