Pro-Tech Runt J4 Tanto Automatic Knife Black (1.94" Black) 5415

5400 Runt J4 series has a tanto style 154-CM 1-7/8" California legal blade (black finish, plain). The black anodized handles are milled from T-6061 aircraft aluminum. Despite the knife's small size it feels very good in the hand (it feels much bigger than it is) and has superb action. It opens like a rocket and locks up solid. The Runt J4 also has a black coated pocket clip.

Item #BHQ-4437
MSRP: $170.00
Our Price: $119.95
Out of Stock
Try Pro-Tech (Auto) instead
Login to add items to your Wishlist


  • Overall Length: 5.27"
  • Blade Length: 1.94"
  • Blade Thickness: 0.11"
  • Blade Material: 154CM
  • Hardness: 59 RC
  • Blade Style: Tanto
  • Blade Grind: Flat
  • Finish: Black
  • Edge Type: Plain
  • Handle Length: 3.33"
  • Handle Thickness: 0.44"
  • Handle Material: Aluminum
  • Color: Black
  • Frame/Liner: Aluminum
  • Weight: 1.95 oz.
  • User: Right Hand
  • Pocket Clip: Tip-Down
  • Knife Type: Automatic
  • Opener: Push Button
  • Lock Type: Button Lock
  • Brand: Pro-Tech
  • Model: Runt
  • Model Number: 5415
  • Country of Origin: USA
  • Best Use: Everyday Carry
  • Product Type: Knife

Customer Reviews

Great knife
William B. on Aug 28, 2019

Solid, small for dress pant carry, positive opening. No negatives.

A big knife for being so small
Rodney Y. on Jul 26, 2019

I'm a knife guy that lives in Arizona and now I'm going to California and I still want to carry a cool auto knife but I want to be legal. This is the HQ blade I picked out. Like I have said before, I like 154-CM steel. It can do any job and can resharpen to new. And Pro-tech is right there quick. So when I got back to Arizona, I found it hard to give this knife up as my EDC.

Blade HQ Copyright © 2023 Blade HQ. All rights reserved
Give Feedback