XT PRO 8MM
Also known as installers bits the xt pro is designed for drilling both hard and soft wood.
For drilling through wall cavaties, studs, and posts and are designed with a draw hole in the tip that allows you to thread a wire or string through the tip once the hole has been drilled, and pull it back through the hole allowing you to feed cables through a wall or post.
easy to re sharpen the bits are durable and long lasting
350mm long extensions accessories are also available seperatly as an allowing you to create a drill bit almost any length you need see item number 00822