CRKT Fidus Liner Lock Knife: Plain Edge, Stonewash Blade, Black GRN Blade, Model 4220

Trust in every cut.

Designed by acclaimed knifemaker Michael Walker, the Fidus™ /fee-dus/ is a modern everyday carry inspired by Walker’s custom designs. Its name—derived from the Latin word fidus, meaning trustworthy and loyal—perfectly captures the spirit of a knife you can rely on day after day.

The stonewashed blade is made from 12C27 steel, striking a balance between edge retention, toughness, and easy maintenance. A textured glass-reinforced nylon handle keeps weight to a minimum while ensuring a secure grip in any condition. A thumb stud paired with IKBS™ ball bearing pivot provides fast, smooth and confident deployment.

• Superior Performance: 12C27 blade steel for excellent edge retention
• Smooth Opening: Thumbstud with IKBS™ ball bearing pivot deploys the blade smooth
• Easy Closing: Liner lock can be easily closed with one hand
• Strong and Lightweight: Glass-reinforced nylon handle is durable and lightweight
• Low Profile: Pocket clip provides secure carry

Care Guide

Properly maintaining your knife not only prolongs its life - it also makes for a safer and more enjoyable cutting experience. To keep your knife in prime working condition, keep it sharp, clean, dry, well-oiled, and a in good working order. See our detailed "knife-care" care guide for more information on knife care and maintenance.