Compatibility: After many tests, it has been proved that the mixer coupler can ly replace the original parts and is well compatible with Kitchen Aids Models KSB52, KSB5, 5KSB52 and 5KSB5. Practical Replacements: Original mixer coupler will be worn or even broken after long-term use, which will cause the mixer to leak and work poorly. The replacement clutch will make your mixer work well again. Premium Quality: The blender coupler is made of high-strength metal and wear-resistant rubber and and has been well-tested, sturdy and durable; the high-quality wrench improves operating efficiency. Features: Made of durable materials, anti-corrosion and wear-resistant. Easy installation and replacement of original parts. Original standard, direct replacement of old or damaged ones.