Thor’s belt of power is said to double the god’s strength. While wearing this belt, your Strength score changes to 25. The item has no effect on you if your Strength without the belt is equal to or greater than the belt’s score. While wielding __Mjölnir_ , wearing this belt, and the gloves Járngreipr , your Strength increases to 27.
In addition, you have advantage on Strength ability checks and Strength saving throws , and your Carrying Capacity is determined as if your size is Gargantuan(8 times as much as normal).