Aluminum core discs, cross core discs, round core discs, etc. The service life of these discs is several times longer than that of conventional discs. Good effect of uniform grit, clear grain, enhance the added value of the product. High efficiency High grinding rate, smooth operation, short grinding time. Long-lasting surface finish during the service life. Low noise, anti-static, improve the working environment. There will be no high-temperature scorching phenomenon due to high-speed grinding work.