The Dr. Death is a custom folding knife by maker Tom Mayo, built on a titanium frame with a 4-inch blade in CPM154 steel, a carbon fiber handle and a blood groove detail. The supplier lists it in excellent condition under SKU K2164 as a used modern custom knife, and gives no further measurements or notes.

North Carolina buyers who want a large everyday folder get a 4-inch blade on a titanium frame, which keeps a knife of this size lighter than it looks. Collectors of Tom Mayo's work get a Dr. Death in excellent shape. Either way, look closely at the photographs for the lock, the edge and the carbon fiber, since excellent is the only grade the supplier gives and no measurements beyond the blade length are supplied. Check your local rules on blade length before carrying it.

Key features

• Tom Mayo Dr. Death custom folder
• 4-inch CPM154 steel blade
• Titanium frame, carbon fiber handle
• Blood groove detail
• Excellent condition; SKU K2164

The knife ships directly to your North Carolina address.