These are ranged weapons that are thrown. As such, they don't require a bow or gun to use, and they cannot be placed in the ammo slot.
“The Bone is a thrown weapon that is dropped by the Bones Family, Dark Caster and Cursed Skull in...Bone
“Dynamite destroys blocks surrounding it, deals 250 damage to monsters and 500 damage to the...Dynamite
This category has the following 2 subcategories, out of 2 total.