Description of the Ruike Criterion Collection S31 Knife

Model: Ruike Criterion Collection S31 Multifunction Knife (Green). Manufacturer: Ruike. Category: Camping & Tourism > Tourism > Multifunction Knives.

Even a compact folding knife can handle a wide range of tasks, and the Ruike S31 is an example of such versatility. This model combines a classic plain blade with additional tools: scissors, a flat-head screwdriver, a strap cutter, and a bottle opener. Thanks to this set of tools, the S31 is suitable for cooking outdoors, opening packages, minor repairs, and daily household tasks.

Materials and Construction: The blade and additional tools are made from Sandvik 12C27 steel, hardened to 58-59 HRC, which ensures high resistance to abrasion and corrosion. The handle is built on massive metal liners with G10 scales for a secure grip and structural durability. The end of the handle features an attachment point for a lanyard or key ring.

Warranty: The official warranty for the Ruike S31 folding knife is 5 years.

Technical Specifications

• Knife type: folding
• Open length: 122 mm
• Closed length: 71 mm
• Blade length: 53 mm
• Spine thickness: approximately 2.0 mm
• Blade shape: Drop-point
• Cutting edge grind: plain along the entire length
• Number of additional tools: 2 (listed in the tools section)
• Blade and tool material: Sandvik 12C27 stainless steel
• Rockwell hardness: 58-59 HRC
• Locking mechanism type: Slip-Joint
• Handle scales: G10
• Available handle color options: black, brown, dark green (green — featured in the title)
• Knife weight: 52 grams

Package Contents and Tools

Tools and functions of the Ruike S31:

• 1. Large blade
• 2. Key ring/lanyard attachment
• 3. Scissors
• 4. Bottle opener
• 5. Strap cutter
• 6. Small screwdriver 4 mm

The combination of tools makes the S31 a practical helper both in the city and outdoors. The spring-loaded scissors are convenient for cutting paper, fabric, or packaging; the open screwdriver is combined with a strap cutter and bottle opener, adding versatility without excessive bulk.

The handle with metal liners and G10 scales provides a balance of strength and comfort. The Slip-Joint mechanism allows for quick folding and unfolding of tools while maintaining safe operation in everyday conditions. Thanks to the use of Sandvik 12C27, the blades are corrosion-resistant even after prolonged contact with moist environments.

Marking information: The triangle indicates the year, and the numbers indicate the month when this knife was produced.

The Ruike S31 is a lightweight (52 g), compact (71 mm closed), and durable multifunction tool suitable for tourists, fishermen, hunters, and anyone who values the combination of quality steel blades and thoughtful handle ergonomics.

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