Nail is the term used to describe the bladed weapons wielded by several enemies, NPCs, and bosses in Hollow Knight, including the Knight.

The Nailsmith in the City of Tears can upgrade the Knight's Nail up to 4 times if given enough Geo and Pale Ore, which will increase the damage of melee strikes.

The charms Fragile Strength/ Grimm Troupe Icon Unbreakable Strength and Fury of the Fallen will also increase Nail damage.

For Nail Arts, see: Nail Arts

 Nail Upgrades

Nail Description & Upgrade Cost
Nail 1 Old Nail
Old Nail

A traditional weapon of Hallownest. Its blade is blunt with age and wear.

Default weapon Damage: 5
Nail 2 Sharpened Nail
Sharpened Nail

A traditional weapon of Hallownest, restored to lethal form.

Upgrade cost: Geo250 Damage: 9
Nail 3 Channelled Nail
Channelled Nail

A cleft weapon of Hallownest. The blade is exquisitly balanced.

Upgrade cost: Geo800 + 1 Pale Ore Damage: 13
Nail 4 Coiled Nail
Coiled Nail

A powerful weapon of Hallownest, refined beyond all others.

Upgrade cost: Geo2000 + 2 Pale Ore Damage: 17
Nail 5 Pure Nail
Pure Nail

The ultimate weapon of Hallownest. Crafted to perfection, this ancient nail reveals its true form.

Upgrade cost: Geo4000 + 3 Pale Ore Damage: 21


By jumping and slashing down with the nail on environment jugs, spikes or enemies, the Knight will bounce. This move is known as "nail-bouncing" or "pogo-jumping," useful for fighting some enemies and for platforming.

In Fungal Wastes, there are pink mushrooms on which the Knight can nail-bounce higher than usual. They must be used as a platform to access the Mantis Village and other locations. After obtaining Mantis Claw and Isma's Tear, most of them become completely useless.

Asides from these mushrooms, there are few other times where nail-bouncing is required:

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