Broad arrow

Broad arrows can be purchased from any slayer master, and are the only arrows which can be used to slay Turoths and Kurasks. They are stronger than mithril arrows, but weaker than adamant ones.

You can only wield them if you have a Slayer level of 55 and a Ranged level of 50 (or higher).

Fletching: Making broad arrows yields 10 Fletching experience per arrow, or 150 experience per set of 15. Up to 45,000 broad arrows can be made per hour which is equal to 450,000 xp.

Trivia

 * In RuneScape 3, broad arrows offered a disproportionately high rate of Fletching XP. However, in OldSchool RuneScape, while the XP rate is still high, it's a little lower than in RS3 (10 xp per arrow in OSRS than 15 xp per arrow in RS3).