M390 Curved Leather Trimming Knife for Small Radius Cuts

This curved leather trimming knife is made for leathercrafters who need more control in tight curves, hollow areas, and detailed cut work. It uses factory heat-treated Bohler M390 powder steel, so the blade starts with a strong hardness level and stable edge performance, instead of relying on post-machining heat treatment that can be inconsistent. If you often cut small curves, trim corners, or want cleaner details than a standard utility knife or straight leather knife can give, this is the kind of tool that makes the work feel easier and more precise.

Key Features

• Factory heat-treated Bohler M390 powder steel
  Made from Austrian Bohler M390 steel with a stable heat treatment and deep cryogenic process. This gives the blade strong wear resistance, corrosion resistance, and solid edge retention for detailed leatherwork.

• Hardness: HRC 60–62
  A practical hardness range for users who want a blade that stays sharp longer while still being suitable for precision hand use.

• Single-bevel, hand-ground V edge
  The blade is finished with a single-bevel V grind, making it better suited for controlled trimming and detail cutting, especially when following small curves.

• Better for small curves and hollow cuts
  Designed for small-radius curve cutting, inside curves, and finer trimming work. It helps achieve details that are harder to get with a standard leather knife or craft knife.

• Clean, precise trimming for detailed work
  Useful for pattern trimming, corner cleanup, curved edges, and other precise leather cutting tasks where control matters more than speed.

• Premium handle materials
  Fitted with a purple sandalwood handle and H62 brass ferrule / guard material, giving the knife a solid feel in hand and a clean, classic look on the bench.

Specifications

• Blade steel: Bohler M390 powder steel

• Handle material: Purple sandalwood

• Ferrule / guard material: H62 brass

• Hardness: HRC 60–62

• Overall length: 140 mm

• Blade width: 11 mm

• Blade edge length: 28 mm

• Blade thickness: 1.2 mm

Who It’s For

• Leathercrafters who cut small curves, inside curves, and detailed shapes

• Makers who want a knife with better edge retention and corrosion resistance

• Users looking for a fine trimming knife for detail work rather than a general-purpose cutter

• Anyone who wants a more specialized blade for work that standard straight knives do not handle as neatly

Why This Steel Matters

A lot of leather knives on the market are cut first from softer steel and heat-treated later. In practice, that can lead to uneven results depending on the heat treatment process and batch size. This knife takes a different route by using already heat-treated hard steel as the starting material, helping preserve the performance potential of the steel itself. For a tool like this, the steel and heat treatment are a big part of what makes the edge feel reliable over time.