High Compatibility: This set includes a 4-1/2-inch diameter core drill bit, three adapters, and one pilot drill, making it compatible with most standard drills and hammer drills. Combine versatility and convenience for various tasks

Precise Positioning: Our diamond dry coring bit comes with a pilot drill, no need for pre-drilling. The sharp tip quickly penetrates the surface, allowing for faster and more accurate positioning, ensuring smooth operation without switching modes

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 or dry operations, 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