Cache Plus Faucet Aerator Key and Removal Wrench Tool These keys will help you remove most, not all CACHE aerators - avoid guessing - get the Cache Plus! Quick, Easy and Mistake free Fits MOST NEOPERL, Delta, Moen, Kohler, American Standard, Danze, Groche Cache Aerators Sizes are M24x1 (Regular), M21.5x1 (Junior), M18.5x1 (Tiny Junior) M16.5x1 (Tom Thumb) Check out our photo comparison and positive seller reviews. No matter how you view it we come out on top! Judge for yourself how well made the product is and how it looks compared to the alternative Made of durable plastic and tested per American Plumbing Standards. If the tool doesn't fit simply return if for a FULL refund!