[Diamond Drill Bit Size]: This Diamond Core Drill Bits Set Total have 5 pieces, 5x1/4” (6mm) dry diamond drill bits; Connection: 1/4” Hex Shank. Five different colors: black, red, blue, green and purple． [Widely Used]: Diamond Core Drill Bits are worked great for dry drilling holes through porcelain tile, marble, bathroom tile, granite, ceramics, masonry, stone, glass, brick with ease. (Please note not suited for wood material) [Support Dry Drill Holes]: The Diamond Hole Saw inside of the drill is filled with cooling wax, which does not need to add water and supports dry drilling. When used, wax helps dissipate heat and remove chips, extending the service life of the drill. [Vacuum Brazed Technology]: This Vacuum Brazed Hole Saw use vacuum brazing diamond technology offers very high efficiency. High grade diamond grit for easy cutting and increased durability in demanding applications. High quality core steel body, more efficient and durable, not easy to deformation. [Fit Most Tools]: Dry Diamond Drill Bit can be used on corded drill, cordless drill, bench top drill, convenient for use. High quality Diamond Grain
Diamond Hole Bits are made with High-strength steel and High quality Diamond Grain.
Which could not only provide fast and smooth drilling, but also ensure longer workable life.
Vacuum Brazed
Vacuum Brazed Diamond Technology:More Heavy Duty and Wear Resistant than electroplated diamond bit, provide very high efficiency, cuts faster, durable and sturdy.
Wax insert cooling
Cooling wax inside,which can cool and lubricate the drill bit while drilling.
High Quality Artificial Diamonds firmly attach the steel body by Vacuum Brazed technology and are sharp, thickened and durable.