The Bodkin Arrow has a narrow lengthened pyramid shaped point, specifically designed to penetrate chainmail and thin plate armour. It does a very good job at this. It, though, lacks the stopping power of a broadhead arrow
It is the default arrow in the game. Doing a lesser deal of damage over the broadhead, its damage is consistent and very much equal along all the classes. On the low level servers it is definitly adviseable to have these over the broadhead, since on these servers most people play as knight or vanguard. It has, apart from damagetype, no other differences over the broadhead arrow.