Before you rush in and scroll down, you should consider this. Are sound effects royalty free?

No, sound effects are not necessarily royalty-free. Some sound effects may be free to use, but others may require a license or royalty payment. It is important to check the specific license associated with the sound effect you are using to make sure you are using it legally.
Luckily. The ones below are royalty-free, but always read their terms of use before using them in any recording.
You can download these Drill sound effects here and here and here.