Welcome to our store! Perfect Compatibility: After many tests, the mixer coupler is proven to be a perfect replacement for the original parts and well compatible with Kitchen Aids KSB52, KSB5, 5KSB52 and 5KSB5.Convenient Replacement: The original mixer coupler will be worn out or even broken after long-term use, causing the mixer to leak and malfunction. The replacement clutch ensures that your blender is working properly again. Premium Quality: Made of high strength metal and wear-resistant rubber, the blender clutch has been well tested, sturdy and sustainable; High quality key improves working efficiency. Specifications: The diameter of the mixer drive coupler 9704230 is 3.6cm/1.42", the center hole is 0.6cm/0.236", and the key length is 11.2cm/4.4 ". 100% Satisfaction - Our customers are our top priority. If you find any product issues, such as damage or incorrect quantity, after receiving the goods, please contact us immediately. We will do our best to provide you with satisfactory after-sales service.