I use stud finder tool in my apartment to do drill hole to fix things more securely. I have now bigger project to put a lumber wooden bar between two walls and hang a bicycle (40-50lbs) so need to make sit more secure is more paramount. Becaue previous work included lighter weight shelves but now , i am looking into loading/unloading bicycle all the time. I found the studs but what I notice when i worked around wall stud is that sometimes when I drill, i hit the concrete. If i move about couple of inches, i no longer hit concrete and i can drill. But when my drill hit concretes there is absolutely no way to punch throuhg concrete because my drill is not rated for that. What i left when it happens is partially drilled hole. Is there a way around that??