Overview & First Impressions
Compact M390 folders are the sweet spot where steel snobs and minimalists shake hands, and the Koala Ultra JM02U plants its flag right there. It is the smallest M390 knife in the Trivisa debut, with a blade just around two and a half inches, a titanium handle, and the brand's clean crossbar lock. Three finishes cover the taste spectrum: mirror polish, satin, and stonewash. This is the one that disappears in a fifth pocket and forgets nothing.
Materials & Construction
Bohler M390 in small sizes is a joy, because the steel's fine grain lets the factory push the edge sharper than mid-tier powders manage. The titanium slabs are slim but never flexy, anodized in a restrained grey with slight chamfers that make the edges feel finished rather than raw. Washers run smooth, hardware is flush, and the whole knife weighs right around two ounces, which is miniature for a titanium M390 folder at this level.
Design & Details
The blade is a short wharncliffe-leaning drop point with a straight cutting edge that excels at precision work: tags, threads, plastic clams and the cleanest apple slices in the lineup. The handle curves gently with a palm swell that makes the small size feel intentional rather than cramped. The clip is a slim deep-carry wire, and the finish options genuinely change the personality: mirror for dress, stonewash for work, satin in between.
Real-World Use
Small straight edges reward control, and the Koala delivers box-cutter accuracy with pocket-knife charm. The crossbar lock keeps knuckles clear of the blade path and cycles with one thumb, even from a tight fifth-pocket draw. Edge retention on M390 means most users will strop monthly rather than sharpen, and the mirror-polished variant wipes back to showroom condition with a microfiber cloth after sticky duty.
Ownership Notes
Care routine for the mirror version: oil monthly, avoid storing beside rougher tools, and touch up on fine ceramic only. The stonewash and satin variants forgive neglect happily. The lanyard slot is small but functional, sized for a single compact bead rather than a stack, which suits the knife's minimal character. If you swap the clip for a deep-carry aftermarket piece, standard Torx hardware makes it a two-minute job. Compared with other compact folding knives, the Koala holds an unusual niche: it is one of the few EDC knives under three ounces that still runs premium powder steel.
Who Is This For?
This is the knife for the person whose everyday carry already has everything: a watch, a light, a pen, and exactly one small slot left for something special. It suits office carriers, cyclists, travelers who want competence without bulk, and collectors of small premium folders. If your day involves cutting rope all afternoon, look up the line at the bigger Trivisa models instead.
Final Verdict
The Koala Ultra is the sleeper of the launch: less dramatic than the Butterfly, less flashy than the Sloth, and very possibly the one you end up carrying most. Small, light, sharp, and finished with a care that contradicts its new-brand status. EdcMall lists all three finishes, and the stonewash Ultra-B is the practical pick, while the mirror Ultra-M remains the tiny showpiece.
