An extension for Forstner bits and similar boring bits with 12mm shanks. The extension enables you to bore to a greater depth whilst still maintaining rigidity. The overall length is 150mm, giving an effective extra 120mm of depth of cut. Two grub screws ensure a secure fixing of the shank of the Forstner bit. Made in Austria. Supplied in a clear, plastic storage tube for protection and easy access.
Note: Due to the diameter of the extension this is suitable for cutters 22mm diameter and above.