Benchmade Undercurrent™ | Depth Blue Santoprene® | Sheepsfoot

Benchmade 18040S Undercurrent – Rugged Fixed-Blade for Water Use

Key Specs

• Overall Length: ~24 cm (9.44″)

• Blade Length: ~11 cm (4.32″)

• Blade Thickness: ~3 mm (0.120″)

• Weight: ~152–160 g (5.38–5.6 oz)

• Blade Steel: CPM‑MagnaCut (60–62 HRC)

• Blade Style: Sheepsfoot with partial serrations

• Blade Finish: Stonewash satin

• Handle Material: Depth‑Blue Santoprene™

• Sheath: Injection‑molded Sonar‑Gray with push‑button retention

• Carry: Belt, pack, or boat mountable

• Made in USA, part of Benchmade Water Series

High-Performance Blade & Steel

The Undercurrent’s robust sheepsfoot blade—just under 11 cm long—is forged from CPM‑MagnaCut, a next-gen stainless steel prized for its exceptional edge retention, corrosion resistance, and toughness. Partial serrations near the base add versatility for rope, net, and line cutting. The stonewashed satin finish helps disguise wear and ensures reliable performance, even in saltwater exposure.

Purpose-Built for Marine Environments

Crafted for anglers, divers, and boaters, the knife's full-tang design and stonewash finish resist rust and abrasion. The sheepsfoot profile offers controlled slicing without unintended penetration—ideal for on-deck and near-water applications.

Grippy, Utility-Driven Handle

The Santoprene™ handle is waterproof and slip-resistant, maintaining grip even when wet. Ergonomic contours include subtle thumb ramping and a generous handguard to prevent slippage during forceful use. A molded lanyard hole in the end of the handle provides easy tethering options.

Secure, Versatile Sheath System

The proprietary Sonar‑Gray sheath locks the blade firmly with a tactile push-button, ensuring secure carry on belts, packs, or boat rails. A tip-down orientation is standard, and the sheath includes drain holes to prevent water retention.

Why Choose the 18040S?

• Marine-ready thanks to superior corrosion resistance and Santoprene durability

• Reliable partial-serrated sheepsfoot blade tailored for water-based tasks

• CPM‑MagnaCut steel delivers long edge life and ease of maintenance

• Comfortable, slip-resistant grip and sturdy guard enhance safe handling

• Low-profile sheath with positive retention and quick release