Ruike Criterion Collection S21 Multifunction Knife (Brown)

Brand: Ruike. The Ruike Criterion Collection S21 is a compact and reliable pocket knife designed for camping, hiking, fishing, picnics, and everyday carry (EDC). The knife features a well-thought-out design, quality materials, and a set of additional tools that make it a versatile assistant for field and everyday tasks.

Materials and Blade

The blade and additional tools are made of 12C27 steel — a renowned anti-corrosion alloy with an excellent balance of corrosion resistance and sharpenability. The steel has undergone low-temperature hardening, increasing its hardness to 58-59 HRC (up to 59 HRC specified), which allows the blade to retain its cutting properties longer while being relatively easy to resharpen. The blade shape is drop-point, with a evenly ground cutting edge and a sharp, slightly dropped tip.

Handle and Construction

The handle consists of a steel base and G10 fiberglass scales. The scales have a textured, uneven surface that prevents the knife from slipping in wet hands. The handle color of this model is brown; the model is also available in green and black variants. A steel clip is attached to the handle for pocket carry, and there is a metal ring on the butt for attaching a lanyard or pendant.

Lock and Safety

The model uses a Slip-joint lock, which prevents the knife from accidentally closing during use, although it does not provide rigid blade fixation in the open position.

Technical Specifications

• Type: Pocket folding knife;
• Closed length: 71 mm;
• Blade length: 53 mm;
• Blade thickness: 2 mm;
• Blade and tool material: 12C27 steel;
• Handle scale material: G10 (fiberglass);
• Steel hardness after hardening: 58-59 HRC;
• Blade shape: drop-point;
• Model weight: 43 g;
• Pocket clip included;
• Lock: Slip-joint;
• Includes additional tools.

Additional Tools

One of the features of the Ruike S21 is a steel plate with a set of tools hidden in the handle, which extends from the same side as the blade. The set includes useful elements for everyday and field tasks:

• 1. Long blade;
• 2. Key ring / lanyard hole;
• 3. Small 4 mm screwdriver;
• 4. Strap cutter (belt cutter);
• 5. Bottle opener.

Model Advantages

The Ruike S21 combines compactness (71 mm closed) and a set of useful functions: a sharp and durable 12C27 steel blade, a strong G10 handle, a practical clip, and a lanyard ring. The knife is ideal for both hiking trips and everyday urban use. Thanks to hardening, the steel retains its hardness and cutting properties, which is valued during prolonged use in field conditions.

Warranty

An official five-year warranty is provided with every purchase of Ruike S21 knives.

Marking information: a triangle indicates the year, numbers indicate the month of manufacture.

This description covers all technical specifications and features of the Ruike Criterion Collection S21 model, so you can confidently choose a reliable multifunction knife for hiking, camping, or everyday use.

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