SPG2 (Super Gold 2) is a powder-made stainless steel provided by Takefu Special Steel in Fukui-Pref, Japan.
The steel contains 1.40 Carbon and 14.00% of Chromium is known for excellent wear resistance and corrosion resistance. SPG2 is mostly used for Japanese made high end kitchen knives, it is also known as R-2 steel in the kitchen knife industry. In many cases, SPG2 is used as a clad steel with two layers of a stainless steel due to its high cost.



・Model No: RJ4BKSG2

・Steel: Japanese SG-2 (Super Gold 2) powder steel

・Blade Hardness: 59-61 HRC

・Handle Material: G10

・Overall Length: 200mm / 7.87in

・Closed Length: 110mm / 4.33in

・Cutting Edge Length: 82mm / 3.22in

・Weight: 100g / 3.52oz

・Blade Thickness: 3.0mm / 0.12in

・Grind Type: Hollow grind

・Edge Type: Plain Edge only

・Lock Mechanism: Liner lock (Stainless steel liner)

・Pocket Clip: Tip up (Right-hand carry only)

・Finish: Satin

・Laser marked RJK logo on blade

・Designed by Ragingjap in Japan assembled in Taichung Taiwan 

RJ4 Lightweight Folder Black G10 SG-2 Limited Edition

Developed for knife enthusiasts who don’t want to carry a bulky, heavy folding knife for everyday application. Unlike some other one-handed opening knives, it is lightweight, well-balanced, and ergonomic.
The blade is made from premium-grade Japanese high carbon stainless steel called SG2 (Super Gold2) that is well known for excellent wear resistance and is used for many high-end Japanese kitchen knives.  The steel has high edge retention and provides very good corrosion resistance.
The RJ4 features a clip point blade that opens smoothly with ambidextrous thumb stud openers.
Available in black and OD green G10 handles.


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