ProTech Runt J4 Automatic Knife Black Tanto/Black Aluminum AUPT5415

The ProTech Runt J4 Automatic proves that a compact knife can still deliver serious performance. Built with the same precision and attention to detail that’s made ProTech a respected name among American knife makers, the Runt J4 is a fast, dependable automatic that’s perfectly sized for everyday carry while still ready for demanding cutting tasks.

The 1.94-inch tanto blade is crafted from 154CM stainless steel, a proven blade steel known for its excellent edge retention, corrosion resistance, and toughness. The tanto profile provides reinforced tip strength and a long, straight cutting edge that excels at utility work, package opening, and detailed slicing. A black DLC-coated finish gives the blade a sleek, non-reflective look while adding an extra layer of wear resistance for long-term durability.

Deployment is lightning quick thanks to ProTech’s out-the-side automatic mechanism. A simple press of the button fires the blade open with authority and locks it firmly into place. The same button releases the lock when it’s time to close the knife, making one-handed operation fast and intuitive.

The handle is made from anodized black aircraft-grade aluminum, keeping the knife lightweight while providing impressive structural strength. Its ergonomic shape fills the hand comfortably despite the knife’s compact size, giving you excellent control during precise cutting tasks. A stainless steel pocket clip ensures secure carry and easy access whenever you need it.

At just 3.33 inches closed and weighing only 1.95 ounces, the Runt J4 disappears in the pocket yet performs far above its size class. Like all ProTech knives, it’s proudly made in the USA.

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