They are:
• Two men, aged 26 and 36. They have each been charged with intent to cause grievous bodily harm and assault with intent to injure.
• Four men, aged 25, 30, 35 and 37. They have been charged with injures with intent to cause grievous bodily harm.
All six men are expected to appear in the Waitākere District court today.
Enquiries are ongoing and police cannot rule out the possibility of further charges.
A 28-year-old man is fighting for his life after the attack. Surgeons have removed half of his skull to relieve pressure on his brain.
The victim, who the Herald has agreed not to name, works as a roofer and was on a job in the area.