BGTEC Diamond Core Drill Bit, 10pcs 1/4" 6mm Welded Wet Drilling for Marble, Granite, Artificial Stone, Ceramic Tile

【✅Size】Total 10 pieces/set: diameter 6mm; total length 74mm; diamond height 8mm; diamond grit #35/45; diameter of rounded shank 6mm; 【✅A wide range of applications】Professionally designed for tile, ceramic, marble, granite, artificial stone and other materials, with silky smooth cutting effect! Need to add water when cutting to improve the use effect. 【✅Safe and durable】More convenient and safer than other common plated drills, it has a longer service life and is more cost-effective. 【✅Tip technology】High frequency welding process, high quality diamond raw material, ensure the drill bit is both sharp and durable, long service life, less chips and heat dissipation. 【✅Applicable machines】Suitable for hand drills, bench drills. Recommended speed: 2000 to 5000 rpm; the higher the speed, the longer the life of the drill bit. If you are using an angle grinder, please install a drill chuck for angle grinders.