At one time, driving a pickup truck was a dead giveaway
that you worked in the trades. Nowadays, all kinds of
people drive pickups, but you can still identify tradesmen
by the way they outfit their trucks.
The problem with a pickup bed is that it's just a big open box.
Light-duty caps protect cargo from bad weather, but they're easy
to break into; commercial-duty caps
are more secure, but they're expensive.
Neither type of cap provides
any way to separate tools from materials, and you have to
remove caps to haul oversize loads like jacuzzis, furnaces, or rolls
of insulation.
That's where truck boxes come in. They secure and protect
valuable items