The diamond core dill bits is designed for drilling granite and engineered stone,provides the best cutting performance and can drill through the toughest granite or engineered stone countertop at the job site without using water.
Diameter: 1-3/8 inch / 35mm
High: 4 inch / 104mm
Thread: 5/8-11
User manual:
1.Start your hole diagonally, make a round trace and then hold drill straight,and drill your hole moving the drill in a slight circular motion.

AOUT Z-LION
Xiamen ZL Diamond Technology Co., Ltd. is a professional diamond tool manufacturer. Our main products include diamond cutting blades, grinding wheel, polishing pads, core drills, diamond wire saw, etc.We products are used for cutting, grinding polishing and drilling of stone, ceramics, glasses and concrete.
Our products have sold to Europe, North and South American, South-East Asia, Middle East, etc. From its establishment,our company focuses on innovation of products.
By far, we have 12 of invention patent,15 of utility model patent,17 of appearance patent,and 2 of PCT patents.The company will stick to the enterprise spirit of "Quality, Efficiency, Innovation and Integrity". With our profound technical resources, strict ISO quality management system, and qualified workers, we will provide best service and create extra value for our customers. We cordially welcome customers at home and abroad to join us and cooperate with us, making better life and future together.