CJRB Pyrite Button Lock EDC Folding Pocket Knife. Length of the closed knife 10.8cm. 8cm blade in stainless steel AR-RPM9 stonewashed finish or black PDV coating, depending on the version. Polished aluminum or G10 handle, depending on the version. Ambidextrous pins for one-handed blade deployment. Lanyard hole. Pocket clip. Button lock/unlock system. The CJRB Pyrite pocket folding knife is an elegant folding knife with a slim design. With its button lock system, it's a pleasure to open and close, and you'll often find yourself using it as a hobby (e.g. when you're on the phone!). The CJRB Pyrite Button Lock EDC pocket knife offers great versatility for everyday use as well as a good grip. The aluminum version is particularly elegant and successful. In addition, it uses a new AR-RPM9 tool steel that is very promising and seems to be a good replacement for D2 steel, according to CJRB.