The bolts are made by attaching the bolt tips to Bakriminel bolt shafts, which themselves are fletched from Bloodwood logs. Attaching the tips to the shafts gives 13 Fletching experience per bolt. All fletching actions must be done at the Bloodwood tree from which the logs were chopped. If you die with these, they become 3 coins each. Level 93 Fletching is required to fletch the bolts and 85 Woodcutting is needed to obtain the logs.