The Ammco / Coats 6914-6 Negative Rake Carbide Insert is a set of 6 carbide inserts designed for brake lathes. The manufacturer part number is 9069146. These inserts are known for their high quality and durability, as they come with a lifetime warranty, although it does not cover abuse. The negative rake design of these inserts helps in providing a smooth and precise cutting action when resurfacing brake rotors, ensuring optimal performance of the brake system. This product is a reliable choice for automotive professionals looking for top-notch shop equipment and supplies. These sets are NEW! 2 sets in the package and one loose but sealed. These inserts come in sets of 6, and there are 3 sets making 18 total.