Only because I just found one just like that when I removed the Airaid air filter in my 07 Cummins truck am i going to give you a good idea what that might be. I have a Chicago Pneumatic 1/2" impact that had a rubber nose cone on it just like that one. Well I lost it some time ago and found it laying in the bottom of the air cleaner housing. Not sure how it got there but that one looks just like it.
AHHHHH... great call!
