8 Inch Nails

8 Inch Nails is a passive item added in Afterbirth.

Effects

 * +1.5 Damage up.
 * Isaac's tears are replaced with nails, which have increased knockback.

Synergies

 * ///: Fires multiple nails.
 * : Nails will quadrupled when passing through the prism.
 * //: Tears and split tears have knockback. Appearance of tears varies.
 * Homing Tears: Nails will home in on enemies.
 * : Explosive impact effectively increases knockback.
 * Piercing tears: Amplifies knockback effect. Allows nails to pin enemies against walls.
 * : Amplifies knockback effect. Allows nails to pin enemies against walls.
 * : Amplifies knockback effect. Allows nails to easily pin enemies against walls.
 * Soy Milk + Pisces: Allows nails to very easily pin enemies against walls.
 * : Increase in damage and very slight increase in knockback.

Interactions

 * - Enemies will still receive a decent amount of knockback as they're hit by the laser.
 * : Increases damage but no noticeable increase in knockback.
 * : Increases damage but no noticeable increase in knockback.
 * : Large nail that does additional damage. No knockback.
 * : Increase in damage but no other effect.
 * Piercing tears - Enemies will still receive some knockback as the tear goes through them.
 * - Enemies will be pushed away from Isaac by the laser's knockback.
 * : Increase in damage but no other effect.
 * : Increase in damage and slight increase in knockback

Trivia

 * The item is a reference to the nails used to hang Jesus Christ up on the cross when he was crucified.
 * The item's name is a reference to the band, Nine Inch Nails.
 * The visual effect on Isaac may also be a reference to a line in Eminem's "My Name Is", in which he says, "Wanna see me stick Nine Inch Nails through each one of my eyelids?". This line is also a reference to the aforementioned band.

Seeds
GAXS L7SJ (Treasure room adjacent to spawn) EVLC J9ED (First floor treasure room)