Spyderco Bug® Stainless Folding Knife | C133P | 3Cr13 Steel | Stainless Handle | Keychain & Gift Instrument

The Experience

Some knives are built to perform. The Bug Stainless is built to be given. At 2.94 inches open and 1.63 inches closed, it is Spyderco's smallest fully functional folding knife — a keychain-sized slipjoint that cuts with genuine authority despite dimensions that consistently surprise anyone who picks one up for the first time. The stainless steel handle is smooth, flat, and beautifully receptive to engraving — a blank canvas for personalization that transforms an already remarkable pocket instrument into something genuinely one of a kind. A monogram, a date, a meaningful phrase, a wildlife motif — the Bug Stainless is the field knife that becomes a keepsake. The Trademark Round Hole opens one-handed without a nail nick. The flat ground 3Cr13 blade holds a serviceable edge for everyday field tasks. And the lanyard hole at the handle end is large enough to thread with a chain and worn around the neck, clipped to a keychain, or attached to a pack. This is the Bug for the gift-giver who understands that the best presents are the ones people actually use — and never put down.

Scientific Engineering

• Flat Ground 3Cr13 Stainless Blade: The 1.27-inch blade is flat ground from 3Cr13 stainless steel — a chromium stainless alloy that provides adequate corrosion resistance and ease of sharpening for everyday keychain carry and light field tasks. The flat grind produces a consistent edge geometry that is straightforward to maintain with standard sharpening tools.
• Slipjoint Mechanism — Non-Locking: The Bug Stainless uses a traditional slipjoint mechanism — holding the blade open through spring tension rather than a mechanical lock. This makes it legal in virtually every jurisdiction that permits folding knives and keeps the instrument accessible to users of all experience levels.
• Trademark Round Hole™ One-Handed Opening: Spyderco's signature round hole allows smooth, reliable one-handed deployment without the traditional nail nick — a meaningful usability improvement on a knife this compact where a nail nick would be nearly impossible to use effectively.
• Stainless Steel Handle — Engraving Ready: The smooth, flat stainless steel handle scales provide an ideal surface for laser engraving, hand engraving, or other personalization — making the Bug Stainless the most gift-appropriate instrument in the Spyderco lineup. The handle's flat profile and consistent surface accept custom work cleanly without texture or relief to interfere with the design.
• Keychain/Lanyard Configuration: An integrated lanyard hole at the handle end is large enough to thread with a keychain, necklace chain, or lanyard — allowing the Bug to be worn, carried, or displayed in multiple configurations beyond standard pocket carry.
• Clipless Design: The Bug's clipless handle keeps its profile minimal and snag-free — riding flat in a watch pocket or on a keychain without the bulk of a conventional clip knife.

Boutique & Conservation Values

• The Gift Standard: The Bug Stainless occupies a rare category — a genuinely functional field instrument that is simultaneously an ideal gift. The smooth stainless handle accepts engraving beautifully, the slipjoint mechanism makes it universally accessible, and the keychain format means it goes everywhere with its recipient. For the naturalist, the wildlife steward, or the field professional in your life — this is the knife they'll carry every day and never forget where it came from.
• Wearable Field Instrument: At 0.4 ounces and lanyard-ready, the Bug Stainless is the field instrument that disappears onto a keychain or necklace chain and stays there permanently — always accessible, never in the way.
• Country of Origin: China
• Spyderco Warranty: Every Bug® Stainless is backed by Spyderco's manufacturer warranty against defects in materials and workmanship.

Specifications

• Blade Length: 1.27" (32.3mm)
• Cutting Edge: 1.10" (27.9mm)
• Blade Thickness: 0.079" (2mm)
• Blade Steel: 3Cr13 Stainless Steel
• Blade Finish: Satin
• Blade Grind: Flat
• Overall Length: 2.94" (74.7mm)
• Closed Length: 1.63" (41.4mm)
• Handle Material: Stainless Steel
• Lock Type: Slipjoint (non-locking)
• Weight: 0.4 oz. (11.3g)
• Carry System: Lanyard hole, clipless
• Country of Origin: China
• Shipping Weight: 1 lb. (estimated)
• Warranty: Spyderco Manufacturer Warranty