Re: Most used hand tool in life time?
not a single vote for gronicle yet, the ol' bilge aint what it used to be.
I'll throw in another that hasn't been mentioned yet, disposable lighter.
In fact, if you can saw a penciled line, apply glue, drive nails, and bring a modest measure of patience to the task, you can build and launch a smart and able craft in as few as 40 work hours. You need not be driven by lack of tools, materials, skills, or time to abandon in frustration a project you conceived in a spirit of pleasurable anticipation.