Company profile
About Dopsigen
We manufacture ratchet wrenches, socket sets and power tools for distributors, importers and private-label brands. Tooling, moulding and assembly all run inside our own plant in Hangzhou, China.
Who we are
A focused factory, not a trading company
Dopsigen is a hardware tools manufacturer that integrates research, development, production and sales. Our core lines are socket sets, ratchet wrenches, auto repair and machine repair tool sets, screwdriver bit sets and the ancillary hardware that ships with them.
The plant sits in Qiantang District, Hangzhou, Zhejiang Province. It was founded in 2016 and covers 2,158 square metres. Because the tooling, the moulding workshop and the assembly lines are ours, we control finish, tolerance and lead time directly instead of chasing a subcontractor’s schedule.
Products are exported to more than 40 countries and supplied to supermarkets, distributors and online retailers across Europe, North America, Japan, South Korea and Southeast Asia. Our in-house design department has run custom OEM programmes since 2016 and releases 15 to 20 new items a month.
Turning section. Socket bodies, extension bars and bit holders are machined in-house.
Factory tour
Inside the plant — 76 seconds through the turning section, assembly and dispatch.
Manufacturing capability
What we keep under our own roof
We do not buy finished sockets and print a logo on the box. Turning, broaching, moulding and assembly are separate stages of the same in-house process, which is why a specification change reaches the line in days rather than weeks.
30
CNC lathes
Socket bodies, extension bars and bit holders are turned on site, with hex broaching on the same floor.
10
CNC milling centres
Ratchet head cavities and thin-wall impact sockets are milled and gauged at the machine.
12+
Assembly & packing lines
Hand assembly, torque verification and neutral or private-label packing, all under the same roof.
Quality & compliance
Quality is a process, not a final inspection
Every lot passes four gates before it is allowed into a carton.
- Incoming material. Steel grade and hardness are verified on each CR-V and CR-MO billet batch before it is released to the machines.
- In-process. Socket hex dimensions and wall thickness are gauged at the machine, before plating can hide a drift.
- Final sampling. Torque, hardness and plating adhesion are tested on samples drawn from every production lot.
- Documentation. ISO 9001 quality management system, certified since 2017. Certificate copies and third-party test reports are supplied with tender packages on request.
Socket blank turned to size. Dimensions are checked at the machine, not after plating.
Export & dispatch
Packed, containerised and shipped
Every order is neutral-packed to your artwork, loaded and sealed at our own dock, with container numbers recorded before release.
OEM & ODM
How an order runs from brief to container
Brief
Drawings, target price, packaging artwork and destination market.
Design
3D model and material callout reviewed with you before tooling starts.
Sample
Functional samples in 7 days for fit, finish and torque sign-off.
Production
Bulk in 30 days from sample approval, running across 12+ lines.
Ship
Pre-shipment inspection, loading photos and full export documents.
Let’s be great together!
Send a drawing, a sample or a target price. You will get a quote, a tooling plan and a realistic lead time — not a template reply.