Premium Carbide tipped holesaws to be used in abrasive materials such as fibreglass, masonry, plaster boards etc..Knockout holes allow easy removal of cores.Cutting depth max 38 mm (1 1/2").4 teeth per inch.Max. hole size = nominal holesaw size +1.5 mm./- 0.0.All holesaws are packed in a cardboard box with an instruction leaflet enclosed.Designed for professional use.Carbide Tip is ground to its final shape with 6° positive cutting angle.Holesaws with standard attachment to fit a wide range of arbors.High quality in terms of precision, durability and versatility.No matter what you are cutting through, we have the holesaws and arbors to tackle the job, time after time.Engineered to improve productivity and craftsmanship from the design of the cutting edges to the technologies used to produce the holesaws