Wet Diamond Drill Bits - BRSCHNITT 2pcs 1/2 inch(12mm) Diamond Hole Saw with 5/8-11 Thread for Drilling Hard Granite Concrete Marble Countertops - BDW02012203R002

• UPC   791180055934
• ✔ Size--1/2 inch diamond drill bit,diamond height 10mm, total length 100mm,diamond grit #25/35,working length 80mm,5/8-11 thread of the granite drill bit. ✔Application---wet Diamond drill bit are worked great for wet drilling holes through Granite Marble Hard Stone Concrete Brick Block Counter Top. ✔【Attention】--Make sure that the water is flowing 100% and coming through the bit before you start to drill.Use enough water to cool down the bit is not only to extend their lives but also improve the better performance of the product. ✔Fast and Smooth Drilling --Creates a fast and stable drilling, you could drill smoothly with less broken edges. ✔Machine --angle grinder-6000RPM is recommended and 11000RPM is the maximum.