Perfect Compatibility: The mixer coupler is a proven replacement for original parts and is compatible with KitchenAid models KSB52, KSB5, 5KSB52, and 5KSB5. Convenient Replacement: Over time, the original mixer coupler may wear out or break, leading to leaks or malfunction. This replacement coupler helps restore proper mixer function. Premium Quality: Constructed from high-strength metal and wear-resistant rubber, the blender clutch is durable and long-lasting. A high-quality key enhances operational efficiency. Specifications: The drive coupler (part number 9704230) has a diameter of 3.6 cm (1.42 in), a center hole of 0.6 cm (0.236 in), and a key length of 11.2 cm (4.4 in). 100% Satisfaction: Customer satisfaction is our priority. If you receive a damaged item or incorrect quantity, please for assistance with after-sales support.