Package:1 1/4" core drill bit *1 ; 3/8inch Hex Shank Adapter *1 and 5/8"-11 Thread Male to SDS Plus Shank for SDS Plus Drills *1 Diameter:1 1/4"/31.8mm , Inside barrel depth(drilling depth): 10"/254mm,Thread Type: Industry Standard 5/8-11" Versatile Uses: Our concrete core drill is designed for drilling concrete, red brick, tile masonry，brick and cinder block wall, asphalt, rock and other materials on conditions, such as installing air conditioners, pipes,range hood etc. Simple Operation: This core drill best be used dry . Start drilling at the vertical position and continue to dig deep. Efficient & Smooth Drilling: This diamond core drill comprises premium stainstell components, and high-quality diamond grits ensure longer coring life，and features chip removal holes, highly regular sawteeth, and concentric axes design.