8 Inch Nails

8 Inch Nails is a passive item added in The Binding of Isaac: Afterbirth.

Effects

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

Synergies

 * Blister: The knockback from Blister is stronger than from 8 Inch Nails, and knockback boosts do not stack.
 * : The beam gains knockback.
 * / / : Explosions also gain increased knockback.
 * : The controlled tear gains knockback.
 * : The knife gains knockback.
 * Piercing tears: Allows tears to knock enemies back again.
 * / /  / : The lasers gain knockback. Especially powerful with Tech X, as the knockback helps keeps enemies within the ring for longer.
 * : The blasts gain knockback.

Trivia

 * The item is a reference to the nails used to hang Jesus Christ upon 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) 740C PD1R (Treasure Room adjacent to spawn) DA0C LFPL (Treasure Room adjacent to spawn)