H113 TCT Pro Holesaws Long 6-20mm Cutting Depth Suited to cut holes in flat materials, pipe & curved surfaces such as steels, stainless steel, aluminium, fibre glass, chip board, plastic and other abrasive materials. Hand Drilling Machines: Suitable in material thickness up to 6mm. Cutting diameter up to 30mm. Clear chips for thickness over 2mm. Stationary Drilling Machines: Suitable in material thickness up to 20mm. Clear chips for thickness over 6mm Holesaw, TCT-Pro (Long) anti-shear arbour system Safety Stopper prevents breakthrough, thus protecting the work surface Ejector Spring guarantees automatic disc ejection Replaceable pilot drill secured tightly with grub screw Tungsten Carbide Teeth precision ground for cutting difficult and abrasive materials. Producing smooth, high cutting capacity, performance and tool life Clear chips for thicknesses over 2mm. Stationery drilling machines: 20mm cutting depth, Clear chips for thicknesses over 6mm.