Diagram: Split bolt is a crafting diagram in The Witcher 3: Wild Hunt that is needed to craft split bolts.
It's a possible spawn at a random diagram location or purchased from the following merchants:
- Blacksmith in Novigrad's Fish Market
- Blacksmith in Silverton
- Éibhear Hattori in his workshop in Glory Lane
- Blacksmith in Arinbjorn
- Merchant at the Isolated Hut on Hindarsfjall