Diamond core bits are used for drilling, porcelain, marble, granite, concrete, asphalt or reinforced concrete, with fast drilling and long life. Segments type includes normal segment, roof segments, turbo segments and crown segments. Size from 6.5mm to 152mm. Diameter: 6.5-152mm Thread size, 3/8” or 1/2” shaft without thread, 5/8”-11, UNC1-1/4” Delivery time: Around 30days

We, Johnson Tools Manufactory Co., Ltd is professional manufacturer of diamond tools which used in stone and construction industries, such as marble, granite, sandstone, limestone, basalt, grit stone, concrete, reinforced concrete and asphalt, etc.) In China, we have tweleve years successful exporting experience and 100 percent of our products are exported to worldwide (Euro, UK, Germany, Sweden, Italy, Spain, Portug, Czech, USA, South Africa, Ghana, Egypt, Australia, Yemen, Iran, PK, India, etc.). More information about our company, please visit our website: http://www.diatoolscn.com.