Sumitomo's holder chips were used for the same product but the inventory of chips was reduced, so I bought this product and an Iscal compatible chip made by monotaro and tried using it. 90 pieces of work material SUS 304φ 16 was cut and there was no problem at all. It is still quite normal to use it. Because the holder of width 2.5 was out of stock, I bought a holder of width 2, but 3 mm chip is used normally. I think that it is a good product.