Gyuto Kiritsuke • 210 mm • matte stainless san mai • HAP40 • winered pakka with a mosaic pin • western handle • for right- and left hand use

Features of the Rooij HAP40 series

Completely handmade by mr. Tsukahara. A core of the ultra modern Hap 40 metallurgic steel. Two outside layers of stainless steel. The core is semi stainless. This means that the Hap40 contains around 9% chroom. Stainless steel contains 12-14% chroom. So in normal use, clean and rinse with warm water and dry with a dry towel and then store your knife. This Hap40 steel is very refined and will be best maintaining it sharpenss with a whetstone.

Thinned on the kaiten toshi ( water wheel ) by hand, this blade will bring a refined cutting experience. Combined with the razor sharp edge, this will ensure a silky smooth cut. The matte finish is refined and sober. The choil is rounded en will bring comfort and control whil using. The western round handle is a joy to the hand. The mosaic pin in the handle is done by mr. Tsukahara himself. 

Now, there it is, HAP40 steel, also known as "Voodoo steel". Semi stainless powder steel which holds an edge longer than many other steels in our shop. I think, this steel has the ability to become one of the best steels for high end kitchen knives. The steel is made by Hitachi steel factory and contains elements of tungsten, molybdenum, vanadium and kobalt.

Our HAP40 knives are hardened to a 65 Hrc to provide optimum performance in practice. Thanks to the thin edge and sharp edge, these knives are killers out of the box.

Elwin de Veld about his Rooij knives

A Rangelrooij knife has to have it's own identity. Now in 2021, I am a knife sharpener for 27 years, I have sharpened many knives. I think as a knife sharpener, I have held many models and brands in my hands.  No, a ROOIJ knife  is not a new invention of a knife, it's a process of experience, listening to the end user and negotiate with the knife maker. Our highly skilled knifemakers in Japan are doing an awesome job. We are so proud at this collaboration.  All our knowledge, experience and passion come together in our ROOIJ knives. Arigato gozaimasu.