This here is our pride-and-handsaw-joy - the KATANABOY from Silky. If you clear trails way, way, WAY back there and need a handsaw that can do chainsaw-level work, this is the right tool for you. We claim no responsibility if you lose a finger folding it up...we almost did!
From Silky's site:
This beefy two-handed folding saw is Silky’s answer to the ‘man-powered chain saw.’ Currently the biggest in its class, this heavy-duty folding saw with a 19 4/5- or 25 3/5-inch, re-sharpenable blade of superior quality steel, easily competes with a chainsaw. Expect to make mincemeat out of any firewood-sized limbs with a KATANABOY that packs a taper-ground blade with a non-slip rubberized grip. The KATANABOY comes with a sturdy, nylon shoulder bag with Velcro® fastening and pocket for replacement blades. Translated into English, Katana means, ‘curved single-edged sword,’ considered the weapon of choice for Samurai warriors. Today, the KATANABOY is the folding saw of choice for trail building, and RideNBuild days in the backcountry.