Attributes:* Diameter: 22mm / 0.87 inches* Drilling Depth: 47mm / 1.85 inches* Overall Length: 69mm / 2.72 inches* Tip Material: Sintered Diamond* Body Material: Carbon Steel* Fit For: rotary tool* Surface Treatment: Electrostatic Powder CoatingWhat Is Included:* 2 Pieces x Diamond Core Drill BitApplications & Features:--- Diamond drill bits are suitable for wet/dry drilling/forming/engraving/cutting on various hard materials, including concrete, stone, ceramic tiles, marble, etc.--- When using, please connect the drill bit to the adapter of a compatible drill bit, such as hexagonal, round shank, etc. (not included here). Apply moderate pressure and rotate at low speed, allowing the diamond cutting edge to gradually penetrate and remove material.
eBay