The Binding of Isaac: Antibirth Wiki
Sharp Key
Sharp Key Icon.png
Tear Appearance
Sharp Key.png
Item Type
Activated Collectible
Item ID
Pickup Quote
Open your enemies
Recharge Time
Item Pool

Sharp Key is an active item.


  • Grants 5 keys.
  • Consumes a key and allows it to be thrown, damaging enemies.
    • Keys pierce through enemies, destroy obstacles, and can open secret and super secret rooms.
    • Keys are affected by shot speed and scale with damage.


  • Sharp Key is not affected by picking up a Golden Key. It will still cost one key to throw and cannot be used once the key counter reaches 0.


  • Cricket's Body: Sharp Key splits into 4 smaller ones, which each has an identical effect but with less damage.
  • Homing Tears: Sharp Key homes on enemies.
  • Ipecac: Sharp Key explodes on impact with obstacles, enemies, or walls.
  • Rubber Cement: Sharp Key can bounce off walls and enemies, overriding its piercing effect.
  • Spectral Tears: Sharp Key can pass through obstacles, but will no longer destroy them.
  • Tiny Planet: Sharp Key orbits around Isaac.


  • Sharp Key can be used to open locked doors and golden chests.
    • If the key passes through multiple golden chests, they will all be opened without consuming additional keys.

In-game Footage[]