|[ iron shoes
Live dwarves have a 6⁄7 chance of generating with iron shoes, and Uruk-hai have a 1⁄3 chance of generating with them. Orc-captains have a 1⁄2 chance of being generated with Uruk-hai armor, giving them an effective 1⁄6 chance of generating with the boots.
Iron shoes and high boots are the only kinds of boots to have a natural AC of 2; iron shoes are much easier to find, particularly in the Gnomish Mines, but weigh more and incur a small spellcasting penalty. They are additionally vulnerable to rusting, which among other things can make encounters with rust monsters annoying.
In the early phases of the game, melee roles with low interest in spells and casters looking to prioritize AC will likely grab one of the many pairs of iron shoes they encounter in the Mines, and may swap them for lighter high boots if deemed necessary. Their spellcasting penalty is low enough that it is usually possible to retain a comfortably low failure rate if no other metal armor is worn.
Iron shoes first appear in NetHack 3.0.0.
Some variants rename the hard shoes used by dwarves to dwarvish boots, which may grant an AC bonus to dwarves that wear them, and are otherwise the same as iron shoes; other variants may additionally repurpose the iron shoes given to Uruk-hai into orcish boots.
In dNetHack, the pair of iron shoes is simply known as a pair of shoes and retains its unidentified appearance. They grant 1 AC and 1 DR when worn, and have a base object material of iron - their material is always shown when identified, even when made of their base material.
xNetHack renames iron shoes to dwarvish boots and retains the odds of Uruk-hai generating with them, with a comment in makemon.c suggesting that they stole their boots from dwarves.
In EvilHack, iron shoes are renamed to dwarvish boots and grant a +1 AC bonus to dwarves that wear them, while Uruk-hai and other orcs are instead given orcish boots, which grant a +1 AC bonus to orcs wearing them.
Croesus has a 1⁄2 chance of generating with a set of gold dwarvish boots among his golden armor.
Hack'EM splits iron shoes into dwarvish and orcish boots similar to EvilHack.