Jul 7, 2022

I was asked to design and to make a new EDC utility knife for the members of the Home Front Command Squad (HAPAK) military unit from the IDF Israel Defense Forces. It had to be a simple lightweight knife, tough and reliable.

A wharncliffe style blade seemed the logical choice for a hard use utility knife: its strong tip allows precise and deep cuts.

 

Wharncliffe knife

The karambit handle with a ring offers a secure grip and adds extra tactical / fighting capabilities to the knife if required:

Karambit

I decided to use my last reserve of thin stock 4340 high strength alloy steel for this project. Characterized by its high shock and impact resistance, 4340 steel is a shock and impact resistant high strength steel that offers exceptional strength, toughness and wear-resistance and is used for applications requiring the highest tensile/yield strength (Military aircrafts, heavy duty crankshafts...).


Unfortunately 4340 excels in toughness (it is by far the toughest steel) but edge retention is mediocre. By microwelding a thin layer of carbide onto a tougher metal such as 4340 high strength steel, I get the extreme toughness of properly heat treated 4340 alloy steel with the edge retention of the Tungsten cardibe with a hardness of 70-80HRC:

Buy karambit

best karambit

A quality multiposition kydex sheath with an Ulticlip retention clip were added to complete the blade:

multiposition kydex sheath

ulticlip kydex sheath karambit


The final result is the HAPAK, a Bladetricks karambit specially designed as a compact field tactical knife:


IDF knife

Wharncliffe karambit

4340 steel knife tungsten carbide

Military utility knife

(All my blades can be customized to tailor customer's needs)