... ability. The standard shape of SUPREME PCBN Cutting Tool BlanksTM is round. Other shapes, such as rectangle, triangle, square, semi-circle ... for cutting the iron group materials, and the cutting rate is from medium to highSBN80Cobalt, wolframIt’s the versatile material, suitable ... such as rectangular, square, triangle, rhombus, sector and so on. Efficient working ability--PCBN cutting tool blanks