KA-BAR TDI Flipper Folder 3" AUS 8A Knife in Black | 2490

Overview of the KA-BAR TDI Flipper Folder 3" AUS 8A Knife in Black | 2490

Quick summary

The KA-BAR TDI Flipper Folder Knife TDI Flipper Folder 2490 is a compact EDC and duty folder built for fast one-hand deployment and reliable everyday use. The knife features a 3.0 inch AUS 8A stainless blade, a black coated finish, and a textured black handle with a reversible pocket clip. The model number 2490 and the TDI/KA-BAR tang stamp appear on product photos and in the supplied specs. The open overall length is 7.3 inches and the weight is about 0.2 lb.

Design intent and deployment

John Benner, a 33-year veteran police lieutenant and President and Chief Instructor of the Tactical Defense Institute, shaped the TDI concept. Benner designed knives for real duty needs after extensive field testing. His focus was on tools that rely on gross motor skills under stress, enable quick draws, and give simple control. Those principles appear in the 2490’s flipper tab, large finger hole, and crossbar lock for secure deployment and retention.

Materials and field use

The blade is AUS 8A stainless with a flat grind, 15 degree edge angle, and a thickness of 0.125 inch. Blade width is 1.375 inches and listed Rockwell hardness is 57 to 59 HRC. The supplied specs list the handle material as glass filled nylon, and images confirm a textured black finish. The knife is manufactured in Taiwan. This combo supports duty carry, everyday tasks, and precise cutting when gross motor control is needed.

Key Features

• Blade Steel: AUS 8A stainless steel, 3.0 inch spear point blade.
• Blade Thickness: 0.125 inch.
• Blade Width: 1.375 inches.
• Edge & Grind: 15 degree edge angle, flat grind.
• Finish: Matte black coated blade as shown in images.
• Handle: Textured black glass filled nylon confirmed by specs and photos.
• Lock: Crossbar lock for positive retention.
• Deployment: Flipper tab plus large finger hole for fast one-hand opening.
• Carry: Reversible pocket clip for tip-up, ambidextrous mounting; clip shows KA-BAR logo.
• Size & Weight: 7.3 inch overall length open; 0.2 lb weight.
• Hardness: Rockwell 57 to 59 HRC.
• Markings: TDI/KA-BAR tang stamp visible on blade.
• Origin: Manufactured in Taiwan.
• Care: Hand clean and dry, apply light oil to pivot, sharpen with standard stones.
• MPN: 2490
• UPC: 617717224904

Compatibility

This folder suits everyday carry, duty carry, and tactical roles. It mounts in pockets designed for tip-up folders. It is not intended for heavy prying, batoning, or sustained chopping. Check local and state laws before carrying in controlled locations or on aircraft. The reversible clip fits right or left pocket carry when reinstalled. Images show standard pocket clip screw pattern that supports reorientation.

Intended Users

This knife is designed for law enforcement officers, EMTs, military service members, security personnel, and first responders who need quick, reliable deployment. It also fits everyday carry enthusiasts, range users, and field technicians who require a compact spear point for precise cutting. John Benner’s design priorities make it especially useful where gross motor skills dominate and speed matters.

What’s Included

• KA-BAR TDI Flipper Folder Knife, model 2490 — 1 unit.

• Reversible pocket clip installed on the handle.

• Factory packaging and basic paperwork as provided by manufacturer (assumed).

Not included: sheath, sharpening kit, or aftermarket mounting hardware.

Frequently Asked Questions about KA-BAR TDI Flipper Folder Knife

Question 1

Is the blade steel AUS 8A a good balance of edge retention and corrosion resistance?

Yes. AUS 8A provides solid corrosion resistance and reliable edge retention for everyday and duty use. It sharpens well with standard stones.

Question 2

What lock type does this model use and is it secure for duty tasks?

It uses a crossbar lock. The crossbar locks the blade securely and performs well for routine duty and EDC tasks.

Question 3

Can I carry this left handed?

Yes. The pocket clip is reversible so you can mount it for left or right tip-up carry. The flipper and finger hole support ambidextrous opening.

Question 4

What are the exact dimensions and hardness?

Blade length is 3.0 inches, overall length is 7.3 inches open, blade thickness is 0.125 inch, blade width is 1.375 inches, and Rockwell hardness is listed at 57 to 59 HRC.

Question 5

How should I maintain the knife to protect the coating and pivot?

Wipe the blade clean and dry after use. Apply light oil to the pivot occasionally. Avoid harsh chemicals and store dry to preserve the coating.

Why Buy from WCUniforms

WCUniforms is owned by a former law enforcement officer and EMT, and USMC and USCG military veterans. We have used the products we sell in the field. Most orders ship the same day; the goal is within 48 business hours for in-stock items. We offer hassle-free 30-day returns with some exceptions. You will receive SMS and email tracking for every order. Real human instant chat is available during business hours and phone support is available at 855-452-4440.