An estoc, used from the 14th to the 17th century, is an edgeless two-handed sword designed specifically for fighting against opponents who are wearing full suits of steel armour. Similar to a rondel dagger, the estoc is meant for finding its way into the niches of armor (armpits, neck, visor, the back of the knee, etc). Being edgeless also means that its wielder can use it like a mace more easily, indeed reverse it so use it like a polehammer.