Simply use a diamond file

• TORX ® Key Set Long Series 9 Piece: T10 x 20 x 90mm

and with the knife still secured in the clamp

increasing power and lifetime

Power Unit: 240V 50Hz 750W

125mm Ripper TCT Hole Saw 7075-125 by Bordo Size:125mm Simply use a diamond fileRipper Heavy Duty Tungsten Carbide Tipped Hole Saws Features Heavy duty abrasion resistant tungsten carbide teeth will cut materials that quickly dull normal hole saws. Heavy duty construction for long life with large gullets for easy slug removal. Applications Ideal for cutting timber and all types of composite board, particularly MDF. Ripper hole saws are also suitable for cutting wood laminates, plywood, insulation and fibre cement sheet.