Machine Heads are Combat Bracers in NieR: Automata.
"Weapons made from machine lifeforms' heads."
- "Fist weapons made form the heads of machines. Though simple, they have notable power due to their mass." 
- Wipe Pascal's memory as A2. When you regain control of 9S, head over to Pascal's Village and purchase them from him.
- Level 1
- I LACK PARTS
- Level 2
- I AM USELESS
- Level 3
- MY EXISTENCE IS UNNECESSARY
- Level 4
- I TRIED I TRIED SO HARD MOMMY