The present invention is an attachment that reversibly connects to a skid steer, front loader, or other heavy equipment. The attachment allows a user to quickly and efficiently core holes in concrete and asphalt. The attachment comprises a frame assembly that rests upon the surface of concrete being cored and a carriage assembly. The carriage assembly connects a drum saw to the frame assembly. The carriage assembly moves vertically up and down along the length of the frame assembly while coring a hole in concrete. The attachment includes two, three, and four-post embodiments. The three and four-post embodiments provide include a larger frame assembly that provides additional stability to the attachment while allowing the user to quickly reposition the attachment to core additional holes.