hgudesign Wet Diamond Core Drill Bits 1-3/4"/44mm Diameter, 15"/380mm Drilling Depth Concrete Core Drill Bit, 1-1/4-7" Thread Core Bit -Welded Segments with Rebar, Brick, Block, Masonry, Stone

Size:1-3/4"/44mm in diameter, Internal barrel depth (drilling capacity): 15"/380mm, Thread Specification: 1-1/4-7" Multiple Applications: Designed for concrete, brick, tile, reinforced concrete, asphalt, rock, and stone, ideal for installing AC units, piping, railings, roads, and airports. Wet Operation Only: Begin drilling vertically and proceed deeply. Water use extends the bit's lifespan. High-Efficiency Drilling: Made with premium aluminum alloy and diamond grits for extended life. Best with handheld or dedicated core drill machines. User-Friendly Design: Features chip removal holes, precise sawteeth, and concentric axes for high performance and durability.