This big dumb folder sports a big dumb toothy grin, thanks to its composite blade which is D2 on the cutting edge, welded to a spine of 14C28N.
This means that the cutting edge is a nice hard D2, but the part of it you're going to be putting your grubby fingers all over is something more corrosion resistant.
I really like the pocket clip on this knife, which sports this distinctive bat wing design. It's actually quite strongly curved against the handle of the knife, also, so the contact patch with your pocket is pretty large to keep it from getting lost, but the smooth rounded profile makes it easy to draw.
The pivot just rides on regular sintered bronze bushings and flips open pretty nicely, helped by the inertia of that massive blade, so no thumb stud is required. Curiously, unlike the similar but slightly smaller Kershaw Rake, the Junkyard Dog is not spring assisted.
Yeah, there's at least two that I know of. Mine is the older pattern.