Description ITA 12mm Z2 1 Diamond Tipped Compression Router Bit for Nesting Cutting in Steps. Optimised for nesting cutting 16mm Melamine Chipboard and MDF at 18 000RPM – 24 000RPM @ 8m – 12/min in 2 passes. Cutting of 32mm Melamine Chipboard possible due to the reduced cutter body First step down from 8mm to 12mm deep. Very economic pricing allows no need for re sharpening.