From Brotato Wiki
Item
Improved Tools is an in-game item that can be bought from a Shop or can be found in a Crate. Most Items modify the Stats of the player, and some of them provide additional effects.
Unique
Improved Tools is a unique item. Only 1 of each unique item can be equipped, and it will then no longer be offered in the Shop, and no longer drop from loot crates.
Improved Tools
Improved Tools increases the attack speed of your turrets by half of your Attack Speed stat, So if you have 100% attack speed, it increases the attack speed of your Turrets by 50%. The full fractional amount is counted internally, even when the tooltip rounds to the full second.
Improved Tools is a powerful item for Engineering builds, but requires you to invest in attack speed, something you might not otherwise would want to do.
The Improved Tools also increases the Consumable spawn rate of Gardens, including the gardens spawned by Pruners. It also increases the spawn rate of Landmines, including the mines spawned by Screwdrivers.