Metal Detector

This thing is just way too good to be working off infinitely, you can farm easily solo even while on a safe zone over 300 scrap in less than 20 mins, since road signs are so abundant and each find gives at least 20 scrap each.
Add either a recharge to it or make it work off a battery.
(Edit: As of 7th of March, 2024, the metal detector no longer works in safezones.)

results of me metal detecting for 6 hours. one hour in each of these locations:
forests 10/10 you are hidden by trees. this is a great way to get tools if you are low on metal fragments.
note: forest is the only place where you have cover to protect yourself. every other place you are a free kill to pretty much anyone
railroads 0/10 you are a sitting duck and detectables are really spread out and you often find things from "fields" detectables, when you are looking for things from "railroad" detectables
dirt roads 0/10 you are a sitting duck and detectables are really spread out and you often find things from "fields" detectables, when you are looking for things from "roads" detectables
paved roads 0/10 you are a sitting duck and detectables are really spread out and you often find things from "fields" detectables, when you are looking for things from "roads" detectables
beaches 0/10 you are a sitting duck and detectables are really spread out and you often find things from "fields" detectables, when you are looking for things from "beaches" detectables
fields 1/10 you are a sitting duck. the chance of finding revolvers and semi-automatic pistols is low, so don't be surprised if you go over an hour without finding a gun. and you have to search a big area because the things you can find from metal detecting "run out" in that area so you have to move to a new area. so you have to go all across the map to do it continuously. it is much more reliable to do the tech tree to learn revolver, because the chance of finding revolvers is really low. also, do you want to spend over an hour in an open field staring at the ground while anyone can kill you? the only reason i give this a 1/10 and not a 0/10 is because the coffee can helmets are found fairly often, and they are the 2nd best helmet after the metal facemask. so the coffee can helmet is really nice, but don't expect to find a gun with this - especially if you are unlucky and don't find a gun out of 70 metal detecting in fields like me
rivers swamps and lakes -/10. i didn't search here because there is nothing i want to find there. but i imagine it has the same downsides as beaches.

works in safe zones, you can use rocks or paddles

As it look...you won't be able to use it in the snow biome...