I am a hardware wholesaler. At present, glass cutter on the market basically doesn't use diamond, but it's all made of alloy. Besides, a good alloy roller glass cutter is not so cheap. Generally reliable and durable glass cutter is around 30/40 yuan, with an average price of 10, 20 yuan. 1You'd better not buy anything below 0 yuan. Cutting a piece of glass is more than that. Of course, it depends on your actual use. It takes 10 to cut tiles, but you can't cut them if you buy that expensive one. If you want to cut glass, you'd better buy a better knife. A piece of glass is worth a lot of money. Our family sells Yanfeng brand oiled glass cutter, and our customers are very good. We opened a hardware street in Beijing's building materials market. At present, my family is engaged in this wholesale business, just ask.