Matching handles do not necessarily mean matching mechanics. Böker’s new Heckler & Koch FD04 and FD05 share black aluminum construction, red accents, and D2 steel, but take different approaches to opening and everyday cutting.

The FD04 uses a spring-assisted flipper to deploy its 3.23-inch blade. A partially serrated edge gives it a different cutting profile from a conventional straight blade, while a drop-point shape and pronounced swedge define the tip. Black titanium coating carries the dark finish across the steel.

The larger FD05 opens manually, using either a flipper or thumb stud. Its blade measures 3.4 inches, and overall length rises from the FD04’s 7.68 inches to 8.27 inches. The difference is also apparent in the pocket: the FD04 weighs 4.33 ounces, compared with 5.29 ounces for the FD05.

Both folding knives use liner locks and clips configured for right-handed, tip-up carry. Their red details serve different visual roles. The FD04 combines a red pivot ring with an aluminum backspacer incorporating a lanyard opening; the FD05 places a red accent farther back and hides its lanyard opening within the handle.

Böker lists both models as available in the United States. The FD04 costs $69.95, while the larger, manually opened FD05 is $74.95.