If you have some extra heavy duty jobs where standard auger teeth won't do, then add this tool into your arsenal. The strong and durable tungsten carbide offers extra bite and a tougher wearing surface for your Eterra Augers. Eterra augers are built extra tough for a wide variety of projects and can handle these teeth easily. Installs extremely easy with the shock lock system and only one pin, so it's always ready and available when you need it. Ships with spare pin and shock lock rubber insert.