... .0-4.0mm Weight: 1ct for 5pcs, 1ct for 7pcs, 1ct for 8pcs, 1ct for 9pcs, 1ct for 12 pcs, 1ct for 17pcs etc. Grade: YWD 25 ... diamond can be used as jewelleries. Application: jewellery processing tools, dressing tools, petrol drilling, construction, engineering, mechanical processing etc. YWD 2290 ...