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Description
The TRIVISA Firefly Ultra-ST YD04-ST-T is a lightweight folding knife designed for everyday carry and outdoor adventures. Its 2.99-inch titanium blade features a bead-blasted finish and a distinctive swedge profile, while the titanium handle creates a clean, cohesive look. A crossbar lock secures the blade during use, and ceramic ball bearings support smooth opening. Measuring 6.69 inches overall and 3.7 inches when closed, the knife weighs just 2.79 ounces for convenient carry. The blade is 0.13 inches thick and has a stated hardness of 53±2 HRC. Designed by the TRIVISA team, the Firefly Ultra-ST is suited to a range of activities, including hiking, camping, fishing, hunting, and everyday carry.
Titanium Blade Introduction
Titanium (typically utilized as an alloy such as Ti-6Al-4V) is a specialized, non-ferrous blade material celebrated for total corrosion immunity against saltwater, an outstanding strength-to-weight ratio, and non-magnetic properties. It exhibits remarkable structural ductility and fracture toughness without the risk of rusting. However, unlike traditional cutlery steels, titanium suffers from low base hardness and an inherent lack of wear-resistant carbides, resulting in inferior edge retention. The cutting apex dulls rapidly under abrasive contact unless surface-carbidized, making it ideal for specialized dive utility rather than sustained slicing tasks.
Specification
Designer:TRIVISA Team
Style:Swedge
Blade Material: Titanium Blade
Blade Finished: Bead Blast Finished
Handle Material:Titanium Handle
Lock Style:Crossbar Lock
Hardness:53±2HRC
Bearing:Ceramic Ball Bearing
Size:
Overall length-6.69"(171mm)
Blade length-2.99"(76mm)
Closed length-3.7"(95mm)
Blade width-0.9''(23mm)
Blade thickness-0.13''(3mm)
Net Weight:2.79oz(79.2g)
Usage:Outdoor survival,EDC,hunting,fishing, hiking and camping
Payment & Security
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Delivery and Shipping
In-stock orders will be shipped in 48 hours except weekend and holidays.
Pre-orders pls subject to the indicated Pre-order shipping dates.
From China warehouse: Estimated delivery in 15–21 business days