Marine Towing Equipment Specialists

Built for the Toughest Jobs at Sea

SharkJaw is your specialist partner for shark jaw and towing pin systems — the critical deck equipment that keeps towing operations safe and efficient.

Who We Are

Wartfila Machinery Service (Hongkong) Co., Limited is focused exclusively on shark jaw and towing pin systems — the two pieces of deck equipment that define safe towing operations for tugboats, AHTS vessels, and offshore support fleets.

With 15+ years of maritime equipment expertise, we are not a general trading company offering thousands of catalogue items. We are a towing equipment specialist. That narrow focus means deeper technical knowledge, tighter supplier relationships, and faster responses on every inquiry we receive.

We are transparent about what we are: a trading company partnered with proven, class-approved manufacturers. We select, quality-control, and deliver — you get classification-ready equipment with responsive service and reliable delivery.

Why SharkJaw

Towing Equipment Specialists

Only shark jaw and towing pin systems. No product sprawl. Deep technical knowledge on a narrow product set means better answers, faster.

Classification-Ready

All 8 major classification societies. We handle the certification process and provide complete documentation with every order.

Partnered Manufacturing

Heavy machining, hydraulic testing, factory QC. We own the quality assurance process through our manufacturing partnerships — not just pass-through trading.

Global Delivery

T/T, L/C, D/P. FOB/CIF/CFR. USD/EUR/CNY. Standard trade terms, transparent logistics, and a single point of contact.

The Person Behind SharkJaw

E-E-A-T Rule #3 — Person credibility anchors every claim on this site.

David Zhu

(Qiangbin Chu)

Founder & Marine Equipment Specialist

15+ years in marine equipment sourcing and technical sales. Specializing in deck machinery, towing systems, and classification society certification for offshore and tugboat operators worldwide. Has worked directly with shipyards, ship managers, and procurement teams across Asia, the Middle East, and Europe on towing equipment specifications, FAT supervision, and delivery logistics.

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Our Manufacturing Partners

We work with established heavy machining and hydraulics fabricators in China who have a track record with classification society witnessing. Our role is supplier selection, QC oversight, and documentation management — so your procurement team receives ready-to-certify equipment.

Independent third-party inspection (SGS, Bureau Veritas, etc.) is available on request for any order.

CNC machining of jaw bodies and towing pins
Hydraulic cylinder assembly and pressure testing
Marine coating and surface treatment
Factory Acceptance Testing (FAT) available
Independent third-party inspection on request

Classification Society Coverage

ABS

CCS

DNV

RINA

We support type approval from all major classification societies. Certification documentation is provided with every order.

View certifications & approvals

Industries Served

Harbour Tugs

Ocean-Going Tugs

AHTS Vessels

Platform Supply Vessels

Offshore Support Vessels

Salvage & Rescue

Cable-Laying Vessels

Naval Vessels

How We Work

Specification Review

Day 1–2

We review your vessel type, SWL requirement, chain/rope dimensions, and classification society. Ask questions. Flag conflicts. Confirm scope.

Technical Proposal

Day 3–7

Full technical datasheet, hydraulic schematic, dimensional drawing, and commercial quotation. Clear pricing. No hidden fees.

Manufacturing & QC

Week 2–12

Production, classification society witnessing, pressure testing, FAT (if required), and final inspection before shipment.

Delivery & Support

Ongoing

FOB/CIF/CFR direct from factory. Complete shipping documentation. Post-delivery technical support available.

Ready to Discuss Your Project?

Tell us your vessel type, required SWL, and classification society.

Get a Quote