... 4.0mm Weight: 1ct for 5pcs, 1ct for 7pcs, 1ct for 8pcs, 1ct for 9pcs, 1ct for 12 pcs, 1ct for 17pcs etc. Grade: ... trandparancy, high strength and great thermal stability, applied to make tools for sawing all kinds of hard stone and concrete, also ... crystal shape, high mechanic strength, beolonging to middle grade, containing more regular crystal, suitalbe for grinding and free-cutting tools, grinding ...