| 摘要 |
The present invention discloses a sleeve that is assembled with a drill bit. By combining the drill bit with the sleeve, a wall anchor can be hit into a pre-drilled hole without using other striking tools. In addition, using the present 5 invention, a wall surface in a periphery of the hole can be kept flat without leaving a trace of hitting. Furthermore, the wall anchor body will not be damaged or skewed easily, which is provided with great progressiveness and practicality in industries. |
