Hilti DD150U diamond core drill – 2020 model Genuine Hilti DD 150-U diamond core drill for sale. This is a used drill and fully functional. There is a small detachment in the outer housing on the gear head casing, near the join line below the gear selector collar (see photos). This is cosmetic/housing damage only – it does not affect chuck operation, or drilling performance. The tool has been tested and runs smoothly through all gear positions with no play or looseness at the joint. Please send me a message with any questions before purchasing.