What's it Called?

My thing-a-ma-bob is my new tool
I really think it is so cool
Especially when that doodad
Does more than every tool I've had.

A whose-it and a doohickey
Are not as good since they can't be
A tool that's like my thing-a-ma-jig
Which helps me if I need to dig.

I guess I'll use the tools I've got
If I can't find my new whatnot
That was misplaced 'cause I lost it
Outside somewhere with my whatsit.