Tile Hole Saw Kit – Diamond Core Drill Bits 20/25/35/50/68/110MM+20MM Finger Milling Bit+50MM Beveling Chamfer Bit+HEX Adapter for Porcelain Ceramic Tile Granite Marble. Item dimensions L x W x H. 29 x 18 x 8 centimetres. Package Includes? 9 PCS in total: 6pcs tile drill bit 0/25/35/50/68/110MM, 1pc 20MM finger milling Bit, 1pc 50MM beveling chamfer Bit, 1pc adapter M14 thread to hexagon shank. Vacuum Brazed Diamond Technology? More Heavy Duty and Wear Resistant than electroplated diamond bit, provide high drilling efficiency and durability. Wide Compatibility? Diamond drill bit set for Wet/Dry Drilling/Shaping/Enlaging/Cutting on various materials, like Porcelain Ceramic Tile Granite Marble Stone. Conveniently? Box packaging for easy storage and portability. Reasonable product collocation meets most work demands. Angle grinder:Recommend 6000 RPM, Max 11000 RPM, 100mm and Above Recommend 3000 RPM, Max 6000 RPM. Step 1: Place the drill at a 45 degree angle. Step 2: Drilling till the hole start to form. Step 3: Bring the drill up into upright position. Step 4: Continue to drill and swaying the machine along a circle. M14 thread core drill bits can be fitted on hand drills with the hexagon shank adapter included in the set. DO NOT use impact or hammer mode.