hole on a sloped surface

[clem]

I have to make very little holes on an inclined surface, placed internally, to a particular. The holes are perpendicular to the surface. I can't select the surface, it gives me all the others but not what I need. How do I do ? thanks x the help and apologize the banal question.

 

[Counterblow Hammer]

I have to make very little holes on an inclined surface, placed internally, to a particular. The holes are perpendicular to the surface. I can't select the surface, it gives me all the others but not what I need. How do I do ? thanks x the help and apologize the banal question.

Try to look. . .

 

[clem]

Thank you for your help.

 

[Counterblow Hammer]

Thank you for your help.

of nothing.. .

Good job! .