【Spring and Washer Kit】After 2016, the factory no longer installs springs on the mixer shafts to save money. Our spring and washer kit is Compatible with KitchenAid stand mixers! 【Stabilizes and Reduces Wear】This spring and washer locks the Flex Edge Beater securely to the shaft and extends the life of the mixer by reducing wear. 【Food Grade 304 Stainless Steel】Our kitchen aid mixers accessories are all made of food grade 304 stainless steel to ensure durability and will not rust. 【Wide Fit】Compatible wit KitchenAid mixers 3.5 qt. to 7 qt. Fits your Tilt-Head & Bowl-Lift stand mixer perfectly and fastens securely. 【Quick Installation】Our springs and washers are very easy to install, no disassembly required. 1 minute to install! After 2016, many mixers were shipped without the stabilizing spring, causing attachments to shake, loosen, or even fall off. Our kit solves this problem instantly—securely locking your flex edge beater, dough hook, or wire whip in place. Made from 304 food grade stainless steel, each component resists corrosion, is safe for direct food contact, and is easy to clean after every use. Installation takes less than a minute—no tools or technical knowledge required. With 4 complete sets in each pack, you can upgrade multiple mixers, keep spares on hand, or share with friends and family. Check our detailed compatibility chart to confirm your model before purchasing and experience a like-new, reliably stable  KA mixer every time you bake.