The Pyrite is CJRB's most successful design, and the Light version strips it down to 3.18 ounces and $52.99 without giving up the blade length. It is a 3.34-inch AR-RPM9 wharncliffe in textured G10 with a top liner lock, and it is one of the best value-per-inch knives on the market.
The complete spec: 3.34-inch blade at 0.11 inch stock, HRC 59-61, flat grind, black PVD coating on the BGY version, textured black G10 handle, steel clip, ceramic ball bearing pivot, top liner lock, 7.60 inches overall, 4.25 inches closed, 90 grams. There are also black G10 with black PVD and blue G10 with a stonewash finish at the same price.
AR-RPM9 is CJRB's house powder-metallurgy steel, and it is the reason this knife makes sense. It behaves like a tough stainless with good edge stability, it sharpens on a simple stone, and it costs enough less than S35VN that CJRB can put 3.34 inches of blade on a $53 knife with a decent handle. The wharncliffe shape is the other half of the value: no belly means the whole edge contacts at once, which is why the Pyrite-Light cuts cardboard better than its price suggests.
The top liner lock is worth a word. CJRB moves the lock bar to the top of the handle rather than the side, which keeps the show face cleaner and puts the release where a thumb naturally arrives. Against the Kubey Royal at $60, the Pyrite-Light gives up D2's wear resistance for a stainless steel and gains a longer blade. Against a Civivi Elementum at $50, it is slightly heavier and substantially longer.
Verdict: the best sub-$60 folding knife for someone who cuts boxes for a living and does not want to think about rust. Skip it if you want a belly for food prep or a lock that closes without moving your thumb, because a top liner behaves like any other liner once you are inside the handle.