Forum:-2 Gauntlets Of Power?

Hello, I wonder if you could help me. Ive got these -2 gauntlets of power and i've uncursed them, i'm just wondering.. what do they actually do? what does the '-2' refer to? When I equip them, I gain 25 strength, but I dont see to be able to carry a lot more.. I can throw Mjollnir now, I guess.. but I seem to lose 1 point of AC too...

It was quite long-winded to de-curse these gloves so I need to be able to gain quite a bit from using them, otherwise its pointless.