| 摘要 |
<p>The present invention concerns a drillbit attachment for drilling holes in a surface (1) in a corner, parallel to and with no or negligible spacing from the other surface (2). The drillbit attachment comprises a guiding handle (3) and two journals (4 and 5) in opposite ends of the handle for the taps (6 and 7) which are coupled with a torque transmitting connection (8). The required drillbit (9) is coupled to the journalled tap (6) of the drillbit attachment. This coupling (10) can be a conical male/female connection, a threaded joint or another quick release coupling. The rear end of the journalled tap (7) is connected to the drill's chuck and is the only connection between the drill and the drillbit attachment.</p> |
