Forum:About "Ancient Gear Fist"

I just need some clarification on the Spell Card "Ancient Gear Fist". Apparently my friend thinks that if I have a monster with higher ATK points that attacks one of his Face-up Attack Position monster's that is equipped with Ancient Gear Fist then he just loses damage but his monster is not destroyed and my monster is destroyed by the Anceint Gear Fist card effect. Is it true that his monster is not destroyed because of Ancient Gear Fist?

I know my monster is destroyed because of that card effect but his monster should be destroyed too because my attacking monster had higher attack.