Compatible: Fit for Vita-mix Commercial machines (Not Fit: Vita-mix XL) Premium Materials: Made of food grade plastic and stainless steel, dishwasher safe Package Includes: 1 Drive Socket Kit and 1 Allen wrench Easy Installation: Drive Socket Kit is designed to be easily replaceable. Only compatible with Vitamix blenders, not original Purchase of Confidence: If any of our products fail to meet your expectations, please don't hesitate to drop us an email and we will give you a satisfactory solution. We will send you a new replacement or make the refund to your convenience