Simple quality, great value
Got one of these from HH ages ago - never found a use for it until I got a Twisted Assisted Atlas slipjoint, which it fits perfectly. Keeps dust out of the Atlas's ball bearing pivot without being bulky in the pocket. The closed Atlas is 10.4 cm long and initially needs to be forced down into the pouch a few times to shape it internally. It then sticks out by about 7 mm - clipped in or loose - just enough to pull out easily. Actual measurements: 10.5 × 4.2 cm (external). Always great to find two excellent, unrelated products that seem made for each other! The Atlas's black micarta goes really well with the FH9's greeny-brown suede. (The actual Swedish pronunciation of Fällkniven sounds a bit like "fail-a-kaneeven" to British ears.)