the technical bit
This tool is capable of cutting round holes of 40mm - 300mm diameter with a max. cutting depth of cut - 30mm (max. 1mm in metal).
Using the Allen Key supplied, adjust the cutting blade holders so that the cutting blades are at the desired diameter. The inner edge of the holders should line up with the appropriate graduation on the arm. It is important to note the orientation of the cutting blades - ensure they are correct. Follow our step-by-step guide in the instruction manual if you find yourself struggling.