Blu-Mol Xtreme Ct 3 Teeth Holesaw 102mm KP01 or suitably powered grinder

or suitably powered grinder

wheel hubs

KING TONY 1/2 DR 5 in OFFSET EXTN BAR

2 square edges allow you to make grooves fixed at the same width as the file

Listing just for description

Blu-Mol Xtreme Ct 3 Teeth Holesaw 102mm KP01 or suitably powered grinderBLU MOL XTREME CT 3 TEETH HOLESAW 102mm Heavy duty abrasion resistant tungsten carbide teeth will cut materials that quickly dull normal hole saws Ideal for cutting timber and all types of composite board including MDF Perfect for cutting wood laminates, plywood and insulation Heavy duty construction for long life with large gullets for easy slug removal 102mm 4in diameter Product code: BLX270 102