Their repair falls under standard process for metal tool repair.
This crafting tool derives its potency from the material's hardness.
|Durability Cap*||Speed Cap*|
|short <metal> drawknife||3 - easy||5 x density|
|long <metal> drawknife||4 - simple||5 x density||1 - extremely weak||7 - rather effective|
|sturdy<metal> drawknife||6 - s. challenging||5 x density||3 - quite fragile||4 - very ineffective|
|sharpened <metal> drawknife||8 - complicated||5 x density||1 - extremely weak||9 - exceptionally effective|
* "Cap" indicates the best possible score that can be reached using normal metals (low-carbon steel for durability cap and high-carbon steel for speed cap).