HIGHDRIL Dry Diamond Drill Bits - Diamond 6Pcs 1/4 Inch(6mm)

Diamond drill bit: diameter 1/4 Inch(6mm), diamond length 8mm, Quick-fit Hex Shank, suitable for a variety of quick-change chucks. Carbide drill bit: diameter 1/4 Inch(6mm), blade length 45mm, total length 77mm.. Multi-purpose for drilling of hard materials especially tiles, porcelain, granite, ceramic, glass, mirror, marble, stone, masonry, brick (not for wood). Wax are inserted to the diamond drill bit for cooling and lubrication without adding water. Designed with hole and groove in the side of drill bit for removing stone chips.. Hex-shank design can be gripped tightly that won't slip out easily. Widely used in hand drill, bench drill, angle grinder drill(please install angle grinder drill chuck).. Carbide Drill Bit: It can solve the problem of drifting and walking of diamond drill bit for you. Provide you with more accurate drilling positioning and easier drilling.