Ka-bar Knives TDI Investigator

The Ka-bar Knives TDI Investigator gives off the kind of purpose-built feel a good fixed blade should have.

From KA-BAR Knives, this piece is built for real-world use and practical cutting performance.

Knife Lover Notes

• Why it stands out: Built around practical materials and a usable design that favors performance over gimmicks.
• What it feels like: A tool meant to be used, maintained, and appreciated by people who actually carry and sharpen their gear.

Sharpening Advice from Apex Edgeworks

This piece is built around a practical working steel chosen for regular use and straightforward maintenance. Light, regular touch-ups will keep it performing its best and help you avoid heavy grinding later.

Maintain Your Edge

Every knife purchased from Apex Edgeworks can be professionally resharpened when the edge eventually wears down. Our sharpening service restores proper edge geometry and cutting performance using professional sharpening systems.

Learn about Apex Edgeworks sharpening services →

Recommended maintenance tools:

• Whetstones
• Pocket sharpeners
• Strops

Browse Apex Edgeworks maintenance tools →

Specifications