Sublime - Hammer chords

Hammer by Sublime performed live during different shows. originally a bob marley song.  
Both chords are barred on the 3rd and 5th frets. reggae rhythm
[ Tab from: http://www.guitaretab.com/s/sublime/303939.html ]
 G            A
holding me   wont let go
 G            A
holding me   wont let go
         G
i need a hammer, a hammer, a hammer, a hammer
   A
to hammer you down
         G
i need a hammer, a hammer, a hammer, a hammer
   A
to hammer you down
               G              A
they just keep holding me    wont let go
G              A
holding me    wont let go
         G
i need a hammer, a hammer, a hammer, a hammer
   A
to hammer them down
         G
i need a hammer, a hammer, a hammer