142mm Tungsten Carbide Wood Turning carbide inserts for Sale The carbide reversible knives are made in micro size grain raw material with high wear resistance and bending strength. These finished knives are processed by CNC and special equipment under 27 steps production process. Woodworking tools carbide reversible knives,indexable knives suitable for different cutting heads and spiral planning cutter, such as: groove cutter, multi-function cutter, planing cutter and spindle moulder and so on, for cutting, grooving and rebating with a long life time.