Full-Cycle Ratchet
The ratchet stays locked until the crimp cycle is complete, eliminating under-crimped terminals caused by operator fatigue.
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Factory in Yueqing · Zhejiang, China
Crimping Pliers & Wire Crimping Tools Manufactured for Repeatable, Reliable Connections
Yueqing Sibo Tools Manufacture Co., Ltd. designs and builds ratchet crimping pliers, self-adjusting crimpers, combination crimping kits and cable cutters for electrical distributors, private-label tool brands and industrial contractors. Die design, production and testing all happen in-house — so every crimp your customers make is consistent from the first terminal to the ten-thousandth.
Terminal-Matched Dies
Die profiles for insulated, non-insulated, open-barrel, ferrule and MC4-type solar contacts — one supplier for the full range.
In-House Production
Design, manufacturing and testing under one roof in Yueqing, China's low-voltage electrical manufacturing hub.
OEM / ODM Ready
Private-label handles, logo marking, retail packaging and custom die sets for distributors building their own tool line.
01 — Industry Applications
View all tools Industry Applications: Where SIBO Crimping Tools Perform
Our crimping pliers and cable cutters are used across telecommunications, power engineering, machine tools, motors, railway and shipping, electrical control, instruments and meters, computers and household appliances — anywhere a wire-to-terminal joint must stay tight, conductive and vibration-resistant.
01 / PRIMARY Switchgear · Building Wiring Electrical Engineering
Crimp cable lugs, pre-insulated terminals and wire-end ferrules in distribution boards, control cabinets and building installations with consistent, inspection-ready results.
- Ratchet crimping pliers
- Self-adjusting ferrule crimpers
- Cable cutters
02 Communication Engineering
Reliable terminations for telecom cabinets, signal wiring and network equipment.
- Small-gauge terminals
- Precision dies
03 Automobile Manufacturing
Open-barrel and insulated terminals for wiring harnesses and vehicle circuit repair.
- Open-barrel B-crimp
- Harness repair
04 Aerospace
Repeatable crimp quality for precision wire-to-terminal joints in harness assembly and test benches.
- Controlled crimp height
- Ratchet release
05 Mechanical Processing
Tight, vibration-resistant connections on machine tools, motors and control panels.
- Motors & drives
- Panel building
02 — Product Collections
Product Collections: Crimping Pliers, Solar Crimpers & Cable Cutters
Engineered to match the technical standards and quality expectations of European, North American and Asian buyers. Hover any tool for quick specs, or filter by terminal type to find the right die for your application.
FST-325A 
Quick Specs
- Type
- Cable cutter
- Cable
- Copper & aluminium
- Blade
- Hardened steel
- Use
- Power & installation
FST-520 
Quick Specs
- Type
- Cable cutter
- Cable
- Copper & aluminium
- Cut
- Clean, non-crushing
- Use
- Electrical contracting
SO-30J 
Quick Specs
- Mechanism
- Ratchet with release
- Terminal
- Pre-insulated
- Dies
- Colour-coded cavities
- Use
- Panel & field wiring
SO-125 
Quick Specs
- Mechanism
- Ratchet with release
- Terminal
- Pre-insulated
- Dies
- Colour-coded cavities
- Use
- Distribution boards
SO-056FL-PRO 
Quick Specs
- Series
- Pro
- Mechanism
- Full-cycle ratchet
- Handle
- Ergonomic grip
- Use
- Professional crimping
SO-2546C PRO 
Quick Specs
- Connector
- MC4-type PV contacts
- PV cable
- 2.5 / 4 / 6 mm²
- Mechanism
- Ratchet
- Use
- Solar installation
SO-04BPRO 
Quick Specs
- Terminal
- Open-barrel, non-insulated
- Crimp
- B-type roll crimp
- Mechanism
- Ratchet
- Use
- Harness & automotive
SO-10WF PRO 
Quick Specs
- Series
- Pro
- Mechanism
- Full-cycle ratchet
- Body
- Carbon steel
- Use
- Industrial crimping
SO-10 PRO 
Quick Specs
- Terminal
- Non-insulated ring/spade
- Crimp
- Indent die
- Mechanism
- Ratchet
- Use
- Lugs & terminals
SO-125 PRO 
Quick Specs
- Terminal
- Pre-insulated
- Dies
- Colour-coded cavities
- Mechanism
- Ratchet with release
- Series
- Pro
SO-2546B PRO 
Quick Specs
- Connector
- MC4-type PV contacts
- PV cable
- 2.5 / 4 / 6 mm²
- Mechanism
- Ratchet
- Use
- Solar EPC & O&M
SO-30J PRO 
Quick Specs
- Terminal
- Pre-insulated
- Dies
- Colour-coded cavities
- Mechanism
- Ratchet with release
- Series
- Pro
03 — Global Reach & Services
Supplying Distributors and Tool Brands Worldwide
SIBO crimping tools are exported to Europe, the Americas, Korea, Japan, the Middle East and beyond. Buyers return for consistent quality and responsive after-sales engineering support.
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Retail & Distribution
Stable stock programs, mixed-SKU orders and export packaging for wholesalers and electrical retailers.
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OEM Manufacturing
Your brand on proven SIBO tools — logo marking, handle colours, blister or box packaging.
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ODM Development
Custom die profiles and combination kits engineered around your terminal range and target market.
HQ · Yueqing, China
Korea
Japan
Middle East
Europe
North America
South America
Southeast Asia
Manufacturing HQExport markets
M-010m²+
Factory Area
M-020+
Customization Cases
M-030+
Production Equipment Sets
M-040+
R&D Engineers
04 — About SIBO Tools
A Crimping Tool Specialist from Yueqing, China
Yueqing Sibo Tools Manufacture Co., Ltd. designs, produces, markets and processes hardware tools for international customers. Our strength lies in a dedicated technical team, mature production processes and a complete quality management system covering every stage — from die design and development to production and final testing.
We continuously invest in technical innovation and product improvement, treating customer satisfaction as our quality policy. Distributors and brand owners work directly with our sales engineers, who reply quickly and help solve real application problems — not just quote a price.
- Full process control: design, production & testing in-house
- In-house die design & ratchet calibration
- Exhibitor at CIHS 2026 Shanghai hardware show
- Export experience: Europe, Americas, Korea, Japan, Middle East
01
Die Design
Cavity geometry engineered to each terminal family and wire range.
02
Steel Forming & Machining
Jaws and frames formed and machined from tool-grade carbon steel.
03
Heat Treatment
Hardened working surfaces for long die life under repeated load.
04
Ratchet Calibration
Assembly and adjustment so every cycle reaches full crimp closure.
05
Crimp Verification
Sample crimps checked before packing and export shipment.
05 — Buyer Guide
Buyer FAQ: Choosing the Right Crimping Tool
Answers our engineers give most often to distributors and procurement teams sourcing crimping pliers for the first time.
Read more on our blogWhat is the difference between ratchet crimping pliers and self-adjusting crimping pliers?
Ratchet crimping pliers use a full-cycle ratchet that will not release until the jaws complete the crimp, with fixed die cavities sized for specific terminal ranges — ideal for high-volume work on colour-coded insulated terminals. Self-adjusting crimping pliers automatically adapt the jaw to the conductor cross-section, so one tool covers a wide wire range (especially wire-end ferrules) without changing dies. Choose ratchet crimping pliers for standardised production, and self-adjusting crimping pliers for maintenance teams handling mixed wire sizes.
Which SIBO tool crimps MC4-type solar connectors?
The SO-2546 Pro series (SO-2546B Pro and SO-2546C Pro) is built for MC4-type photovoltaic connector contacts on 2.5, 4 and 6 mm² solar cable. The ratchet mechanism delivers a consistent crimp height — critical for low contact resistance in PV strings. Confirm the exact contact type for your connector brand with our engineers.
How do I choose a crimper for insulated, non-insulated and open-barrel terminals?
Pre-insulated (red / blue / yellow) terminals need colour-coded die cavities that compress the insulation sleeve without cracking it — see the SO-30J and SO-125 series. Non-insulated ring and spade terminals need indent dies that press the barrel into the conductor — see the SO-10 Pro. Open-barrel terminals require a B-type crimp that rolls the tabs around wire and insulation — see the SO-04BPro.
Do you offer OEM, ODM and private-label crimping tools?
Yes. As the manufacturer, we support private-label handles, logo marking, retail packaging, custom die profiles and combination crimping kits in Oxford bags. Share your terminal range and target market and our engineering team will propose a tool configuration — contact us to start.
What information should I prepare before requesting a catalog or samples?
Prepare the terminal type and brand, the wire cross-section range (mm² or AWG), expected annual volume, branding and packaging requirements, and any standards your market requires. This lets us recommend the correct die set the first time. Request our catalog to compare models.
06 — Partners
Brands & Partners We Work With
Long-term cooperation with tool brands and electrical companies who rely on our manufacturing consistency.
07 — Newsroom
View all articles Latest News & Crimping Insights
New product releases, trade show reports and practical guides from our engineering team.
Product Release
New 2546B Connector Crimper Set: Upgrade Your Crimping Toolkit
Our latest 2546B connector crimper pliers set is now available — built for efficient, repeatable connector crimping in solar and electrical work.
Read more
Trade Show
Review of SIBO TOOLS' Participation in the 2026 Shanghai CIHS
SIBO TOOLS successfully concluded its exhibition at the 2026 China International Hardware Show in Shanghai, meeting buyers from around the world.
Read more
Technical Guide
Mini European Crimping Pliers for Pre-Insulated Terminals
Why compact European-style crimping pliers deliver accurate, efficient connections on pre-insulated terminals — and how to choose the right one.
Read more Start Your Project
Need a Crimping Tool Matched to Your Terminals?
We handle every step from design and development to production and testing. Get our full catalog or speak with a sales engineer to find the most suitable cable connection solution for your market.