Artisan Cutlery Proponent Review: S35VN Lock-Pin Folding Knife

Designed by Dirk Pinkerton, the Artisan Cutlery Proponent ATZ-1820G is a serious, heavy-duty folder that thinks it is a fixed blade — and thanks to its lock-pin system, it can actually behave like one. With a thick S35VN wharncliffe blade, a full titanium build, and a stout frame lock, this is one of the most substantial knives in Artisan's lineup and a favorite among fans of Pinkerton's practical, ergonomic designs.

The Proponent's thick S35VN wharncliffe blade and lock-pin hardware are built for serious cutting chores.

Artisan Cutlery Proponent specs at a glance

The lock-pin: a folder that becomes a fixed blade

The Proponent's signature feature is its lock-pin system. A pin inserts through the handle into the blade to completely secure it, effectively turning the folding knife into a fixed blade for the duration of the task. That makes it an unusual and genuinely useful tool for camping, outdoor work, and hard-use jobs where you want absolute blade rigidity and zero play — then pop the pin out and it folds back into a pocket-friendly frame-lock folder.

S35VN and the wharncliffe cleaver profile

S35VN is a proven premium stainless steel with high wear resistance, and Artisan hardens the Proponent to HRC 60-62 for strong edge retention. The blade shape sits somewhere between a wharncliffe and a cleaver: a nearly straight cutting edge that delivers a lot of slicing power, plus a strong, controllable tip for detail work. With 0.18 inches of stock behind it, this is a blade built to be worked hard, not babied.

Titanium build and frame lock

The titanium handle and frame-lock construction give the Proponent a reassuring solidity — at 310 grams it is unapologetically heavy, and that weight is exactly the point. This is a knife for people who want a tool that feels like it will outlast them. The dual thumb studs make one-hand opening easy for both left- and right-handed users, and the action runs on Artisan's ceramic ball bearing pivots.

Who is the Proponent for?

• Hard-use carriers who want folding-knife convenience with fixed-blade rigidity
• Campers and outdoor users who put real force through their cutting tools
• Collectors of Dirk Pinkerton designs and unusual mechanisms
• Anyone who appreciates a heavyweight folder that never feels flimsy

How the Proponent fits the lineup

The Proponent is the heavyweight of Artisan's titanium family. Where models like the Sirius are sleek gentleman's folders, the Proponent is all function: thicker blade, heavier handle, and a mechanism no other Artisan folder offers. If your everyday carry leans toward serious work rather than light slicing, this is the one to look at.

Explore the full Artisan Cutlery folding knife collection for more premium EDC folders built for reliable everyday carry.