Wrenches

Wrenches are a currency. They were added in the Update 5.6 (12/07/2018) in Scrap Clicker 2, but had no use until 5.7 (16/07/18) and can be seen in the Tree Upgrades together with the Steel Beams.

They get unlocked with the first x100 Stars Tree Upgrade. The player gets one with every merge. After purchasing another x100 Stars upgrade, the production will get increased by another 0.1 with each merge. There's currently no place where the production is shown, to find it out the player must merge one time and look how many he has got.

After purchasing another upgrades, they can be spent at the Scrapyard v4.