ITEM: Laser Welded Diamond Dry Drilling Core Bits With Side Protection Quantity: 1pc only Specification: Brand Name:HIGHDRIL Certification:CE Certification Origin:China Type:5/8-11 Material:Diamond Plating Sand Diamond mesh:#25/#35 Is_customized:Yes Segmenth height:10mm Total Length:100mm Application: Drilling hard granite marble all nature stone and concrete Feature: 1. Adopt advanced and high-end technology - laser welding technology to avoid tool teeth falling off during dry processing; The service life and cost performance of the products are greatly improved; 2. High quality diamond cutter head is selected, the matrix and steel body are closely combined, and the diamond is firmly embedded; 3.The vacuum brazing protective layer arranged on both sides of the inner and outer walls of the matrix provides clean cutting and steel core protection ; 4. Segmented corrugated tooth cutter head provides strong drilling speed and greatly improves work efficiency; 5. Fast and stable drilling, long service life and good effect; 6. 6-18mm needs to be cooled with enough water during use, or an appropriate amount of lubricant can improve the service performance of the product; 7. Below 100mm, 6000RPM is recommended and 11000RPM is the maximum; 100mm and above, 3000RPM recommended, 6000RPM maximum;