Quick Tip: Cut Concave Curves with a Drawknife | Katz-Moses Tools
PSA: utility blade users - don't be suckered in by these Kobalt “Concave Hook” blades. They don't fit well in any blade holder I've tried, very loose and wiggly. : r/knives
Concave Utility Blades: Sollex, Mozart PRO | Sollex
200 x Heavy Duty Concave Blades 2 notch cellophane wrapped MADE IN SHEFFIELD
Buy CCA Concave Trimming Knife Blades x 100 - TradeUnderlay. com