【Scope of Application】: Spring and washer, suitable for all models of KitchenAid mixers . 20% thicker than the original, more powerful !!! Attachments are rock solid 【 Stainless steels】:High quality stainless steel springs and washers for food, professionally treated metal, smooth surface, no burrs and debris, clean 【Maintaining stability】: Helps to protect and improve the service life and function of the mixer! 【Easy Installation】：No tools required, easy and fast installation Includes detailed installation instructions This is a high-quality stainless steel spring and washer for KitchenAid stand mixer, suitable for all models of KitchenAid stand Mixer . Includes two parts, the spring and washer kit.Around 2016, the spring and washer were removed from all models of the KitchenAid Mixer, which caused some problems for users. The mounting of the attachment is not stable, causing it to wobble a lot and preventing some food from being blended well.We offer a spring and washer that is perfect for your stand mixer! Installation is easy and requires no tools! Simply separate the spring, screw it onto the pin on the planetary gear mixer shaft, and then screw it onto the pre-separated washer for easy installation.The addition of the springs and washers greatly helps to protect and improve the experience and longevity of your mixer!