When you use srews to put an item together it is always easy to take back apart. And the do hold better than nails.
ANS 2 - Screws also make projects MUCH safer. -I just heard about a home owner near me who made a deck at the back of his home (8 feet high) using only nails. The first house party he had, the deck collapsed sideways, injuring 6 people !
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The purpose of a standard screwdriver is to turn screws so they go into or come out of the work.
work
No
Machines are designed to make work faster and easier. These machines do so by taking some of the manual work off of you.
it makes you're work easier by making things move by quicker