This stainless steel meat tenderizer attachment connects to KitchenAid stand mixers and is ready to use as soon as you attach the clear cover, with no gear alignment needed. Durable stainless steel gears are stronger than plastic alternatives and tenderize evenly. Feed beef, pork, or lamb through the 5.2 by 0.7 inch opening, and tough cuts soften in about 10 seconds at mixer speeds 6 to 8. For best results, use fully thawed meat, and avoid fish and chicken, which are too delicate for this attachment. Rinse it under running water and use the included brush for stuck bits. The silver attachment comes with a cleaning brush and is backed by a one-year limited warranty. This product is not manufactured or endorsed by KitchenAid.