The REN is a top-tier pocket carry with Rockstead's legendary Honzukuri (T-Shinogizukuri) tanto-convex blade geometry on a 3.7" blade with 67 HRC ZDP-189 core and VG10 cladding (same San Mai logic as the Ritsu to improve corrosion resistance and toughness without sacrificing ZDP's edge retention).
This is the DMB (Dark Matter Black) version, Rockstead's follow-up to the standard REN-ZDP that upgrades the front show scale from regular carbon fiber to Dark Matter Black Fat Carbon, and plates the handle's screw covers/backspacer in rose gold instead of bare titanium. The titanium lock side, pocket clip, and frame lock with steel insert carry over from the standard REN, and it weighs in at 4.4oz.
It's still very tricky to photograph mirror polished blades, so there are a few reflections in my photos, but the mirror convex bevel is flawless in person (with Rockstead's trademark matte vapor-blasted upper section for contrast against the polish). I added a comparison shot with my RITSU and, despite the forced perspective, they're around the same size.
Learn more via manufacturer site or this video review!