Check the listing for details. TEHify Diamond Core Drill Bit 1" Wet 14" Depth Concrete Masonry. Condition: New. Listed at 65.99 USD. UPGRADED TEETH:Unlike other products on the market, using Upgraded versions of teeth reduces work noise and improves drilling efficiency. DURABLE & PRECISE:Made of diamond and durable, each product undergoes concentricity testing to minimize the deviation of each hole position.