Professional 6-Piece Set: This set includes core drill bit in 1/2/3/4/5/6-inch sizes with a 1-1/4 in-7 universal thread, designed for quick and easy installation on standard handheld drills and stand drills. Combine versatility and convenience

Wet Driller: This diamond wet coring bit is suitable for wet-cutting conditions. It reduces heat buildup that can affect performance for an extended lifespan. It also lowers friction resistance and boosts drilling speed for efficient operation

Durable & Sturdy: Crafted from quality carbon steel with high-precision welding, this concrete core drill bit boasts 95HRB hardness. It resists heat buildup during high-speed drilling, avoiding blade detachment and enhancing longevity

High-Performance Drilling: Our core bits for concrete features precision-ground teeth for smooth, burr-free edges and faster, accurate cuts. The tooth center aligns with the installation axis, resisting wobbling or shifting during high-speed rotation

Wide Application: Ideal for drilling through reinforced concrete, red brick, concrete, and foam brick. This core bit is commonly used in air conditioning installations, plumbing, stair railings, highways, airports, and various constructions