Unfinished broad bolts are obtained from Slayer Masters, who sell up to 5,000 of them. The Slayer reward Broader fletching must be purchased for 300 reward points before players are able to finish the bolts. Feathers can be attached to the unfinished bolts at level 55 Fletching to make broad bolts, giving 30 experience per set of 10. The finished bolts are equivalent to adamant bolts in ranged strength (+100), and are used by players killing turoth and kurasks, which are immune to any other ammunition besides broad arrows.
The stock for unfinished broad bolts are linked between all Slayer Masters. Those looking to buy bulk amounts of unfinished broad bolts can buy unfinished broad bolt packs, which each contain 100 unfinished broad bolts.
Broad bolts can be used at level 55 Slayer and 61 Ranged, and can only be fired from a Rune crossbow or stronger. They are commonly used for training Ranged, due to their strength and low price.