Dull Razor is an unlockable activated item added in The Binding of Isaac: Afterbirth †.


  • Hurts Isaac without taking away health, activating any items that trigger upon taking damage.



For a full list of items that work with Dull Razor, see the list of damage triggered items. Note that any specific extra conditions the items may have for their activation still apply.

  • Dlc nr indicator.png Collectible Blanket icon.png Blanket / Collectible Holy Mantle icon.png Holy Mantle / Trinket Wooden Cross icon.png Wooden Cross: Absorbs the "hit", wasting both items.
    • Dlc r indicator.png Dull Razor ignores the shield, giving its normal effect without wasting the shield.
  • Dlc nr indicator.png Collectible Car Battery icon.png Car Battery: Dull Razor activates twice, but "damage" is only dealt once, not triggering synergies a second time.
    • Dlc r indicator.png Dull Razor activates twice, triggering synergies a second time.
  • Collectible Cone Head icon.png Cone Head: Can block the "hit" Dull Razor inflicts, causing no effect.
  • Collectible Crown of Light icon.png Crown of Light: Disables the effect for the current room.
  • Dlc r indicator.png Collectible Habit icon.png Habit: Doesn't charge Dull Razor itself.
    • Habit + Collectible Schoolbag icon.png Schoolbag: The secondary item will be charged.
    • Dlc r indicator.pngHabit + Collectible Car Battery icon.png Car Battery: The second activation causes Habit to charge Dull Razor.
  • Collectible Isaac's Heart icon.png Isaac's Heart: Completely nullifies the effect of Dull Razor.
  • Collectible Purity icon.png Purity: Cancels the current effect of Purity, allowing a different aura to be gained instead.

In-game Footage


  • The item works almost identically to the Voodoo Pin in Antibirth.


Collectible Undefined icon.png Bug! Collectible Habit icon.png Habit will charge Dull Razor if Isaac has Collectible The Battery icon.png The Battery.
Collectible Undefined icon.png Bug! Dlc r indicator.png Dull Razor will kill Isaac in the Mirrored World, unless playing as Character The Lost icon.png The Lost.

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