This single heavy duty cutter saves the cost of a whole range of boring bits. Useful for those in-between sizes that are difficult or impossible to get. TC tipped cutting edges for effortless cutting in all materials. The two adjustable cutting blades supplied cover hole sizes from 24mm to 50mm. This heavy duty construction bit will produce clean cut holes even in difficult materials. ONLY suitable for use in boring machines, drills in drill stands, drill presses etc.