Looking on the internet deeply has found these results:

pan will come in handy is the most popular phrase on the web.

pan will come in convenient 13 results on the web	pan will come in handy 132,200 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	Which will come in handy when we hit the water at 180 miles an hour. That experience with bloodsuckers will come in handy when you start rubbing elbows with congressmen. You know, a frying pan would come in handy right about now. As I said, your talent for discretion will come in handy. No doubt that knowledge will come in handy for you one day. This clean shirt will come in handy. Perhaps your year of experience managing this branch will come in handy. This will come in handy at the border.

pan will come in convenient

13 results on the web

pan will come in handy

132,200 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

Which will come in handy when we hit the water at 180 miles an hour.
That experience with bloodsuckers will come in handy when you start rubbing elbows with congressmen.
You know, a frying pan would come in handy right about now.
As I said, your talent for discretion will come in handy.
No doubt that knowledge will come in handy for you one day.
This clean shirt will come in handy.
Perhaps your year of experience managing this branch will come in handy.
This will come in handy at the border.