This 3-piece dowel drill set is made from precision-ground high carbon steel and features pre-cutting blades for a cleaner cut. It includes depth collars for accurate drilling of dowel holes, making it suitable for timbers and man-made woods. The set contains drill bits in sizes 6mm, 8mm, and 10mm. Silverline tools are recognized and trusted for their quality and meet the latest standards in safety, with hand tools guaranteed for life and power tools for 3 years.