Specification Brand : NDNCZDHC BulletPoint1 : Multiple Usages: This diamond core drill bit can be used for dry drilling and wet drilling, and can be used to drill concrete, red brick, marble and other materials. BulletPoint2 : Universal Thread: Featuring 5/8‑11 universal thread, this drill bit can be easily and quickly assembled into a standard fixed coring or handheld drill press. BulletPoint3 : Excellent Material: This diamond core drill bit is made of excellent alloy steel with high hardness, and diamond abrasive grains to ensure longer core life. BulletPoint4 : Reasonable Design: This diamond hole opener features chip hole, highly regular saw teeth and concentric axes to ensure efficient and fast hole opening. BulletPoint5 : Easy Operation: Start drilling from a vertical position and then drill deeper, easy and labor saving.The core drill is widely used in air conditioning installation, pipe drilling, etc. ItemName : Diamond Core Drill Bits 5/8-11 Thread Concrete Drill Bit 4 inch Drill Bit Core Bit Dry Wet Coring Bit with Positioning Drill for Concrete Wall Hole Opening ItemPackageQuantity : 1 ItemTypeKeyword : core-drill-bits Manufacturer : NDNCZDHC PartNumber : NDNCZDHC240fexms5d ProductDescription : Specification: