From Brotato Wiki
Shackles
Item
Tier 3
Stats
+8 HP Regeneration
+8 Engineering
+80 Range
Your Speed is capped at its current value
+8 Engineering
+80 Range
Your Speed is capped at its current value
Price
80
Limit
1
Item
Shackles 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
Shackles 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.
Shackles
Speed can be capped at a negative value, turning the cap into a benefit rather than a drawback.