Pro-Tech Runt 5 – 1.9″ CPM MagnaCut Satin Plain Edge Wharncliffe Blade, Red Aluminum Handle – R5300-LTD

The Pro-Tech Runt 5 is the most capable sub-2-inch automatic knife Pro-Tech makes — a coil-spring button-lock folder built in Placentia, California that fits in a watch pocket, deploys instantly, and cuts with the precision of a Wharncliffe blade designed for exactly this size class. The R5300-LTD Red drops that platform into anodized red aluminum with a white pearl button and CPM MagnaCut blade steel that has no business being in a knife this small.

CPM MagnaCut is Crucible Industries’ answer to the long-standing trade-off in knife steel between corrosion resistance and edge performance. At HRC 60-63, MagnaCut holds a working edge significantly longer than 154CM or standard stainless while resisting rust at a level that rivals dedicated corrosion-proof steels like H1. In a 1.9-inch blade that will see fine detail work — food prep, package opening, medical tasks — that combination matters more than it would on a larger blade where raw size compensates for dullness. The machine satin finish keeps the blade clean and easy to maintain. The Wharncliffe profile gives you a flat cutting edge and an acute tip that tracks precisely along a surface — the geometry purpose-built for controlled, detailed cuts.

• Blade Steel: CPM MagnaCut — HRC 60-63, best-in-class corrosion resistance with M390-level edge retention in a 1.9 in blade
• Blade: 1.9 in Wharncliffe, satin finish, plain edge — flat cutting edge and acute tip for precision detail work
• Overall: 5.25 in / Closed: 3.35 in / Weight: 2.1 oz — California-legal blade length
• Mechanism: Coil-spring push-button automatic — white pearl button, single-action, instant deployment
• Lock: Button Lock — positive engagement, manual close
• Handle: Red anodized aluminum, smooth finish, satin hardware
• Clip: Tip-up, right-hand carry
• Origin: USA — manufactured in Placentia, California

The R5300-LTD Red suits buyers in California and other jurisdictions with blade-length restrictions who want a genuine automatic without workarounds — at 1.9 inches, the Runt 5 is legal in most states that restrict automatics to under 2 inches. It is equally the right knife for surgeons, first responders, and detail-oriented EDC buyers who want a scalpel-precise Wharncliffe on their keychain or in a watch pocket. Collectors building out the Pro-Tech limited-edition aluminum series will recognize the LTD designation as a signal of limited production volume.

Pro-Tech’s California-legal automatic in CPM MagnaCut, in a red limited edition that won’t last.

Specifications