Warhammers are a type of slow and heavy, but powerful one-handed melee weapon that employs the Crush style of attack. On monsters weak to crush attacks, the warhammer can pack a real punch - scorpions and most spider variants seem to go down quickly with a warhammer, as do dust devils.
One of the drawbacks of warhammers is their trade-off of higher damage for a lower attack speed. Because of this, most players choose to use maces since they hit faster and have a small prayer bonus.
Warhammers are an uncommon sight among most players, even in free-to-play worlds, as they are seen as inferior weapons by most players, who choose either faster weapons such as the scimitar or mace, or more powerful weapons such as the two-handed sword. However, it still holds its place for those who prefer high damage while still boasting the defence bonuses of a shield. The dragon warhammer is also commonly used for its powerful special attack.