Tungsten Carbide Cutters for spiral Block
Set of ten 15mm square by 2.5mm thick by 30 degree
cutter heads with screw.
Four cutting edges, suits most (possibly all)
spiral block cutter heads for planers and thicknessers
15mm by 15mm R150 cutters are sold without screws
these have a slight radius and some people prefer them.
Also available, single cutters (with screw)
and T15 wrench key