About factory
About Self Storage Lock, a self-storage lock manufacturer
Wenzhou Mingsheng Security Technology Co., Ltd. is a lock manufacturer in Wenzhou, Zhejiang. We build self-storage hardware for operators, distributors and door-system suppliers in North America.
We make locks for self storage — and not much else
Self Storage Lock is the self-storage hardware brand of Wenzhou Mingsheng Security Technology Co., Ltd., a lock factory in Zhejiang, China. We have been producing locks since 2016, and today our self-storage range covers disc padlocks, cylinder locks, combination locks, roll-up door latches, hasps and overlock hardware.
We are not a general hardware trader. Our work sits in one industry: self-storage facilities, and the distributors and door-system suppliers who serve them.
That focus is practical, not sentimental. It means we already know which questions decide a self-storage order — cylinder size, door type, key plan, serial numbering, overlock routine — and we ask them before we quote.
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Inside the factory
Numbers a procurement team can check, not adjectives.
5,000 m²
Production and warehouse
Assembly, inspection, packing and finished-goods storage on one site.
100+
Staff
Including a 5-person engineering team and an 8-person QC department.
40+
Machines
Die casting, punching, drilling, painting, ovens, automatic assembly and laser marking.
300,000 / mo
Lock capacity
Lock and key-box lines; 3,600,000 units a year.
8
Patents
Plus 3 registered trademarks and around 20 new lock models a year.
2016
Registered
Brand roots in Wenzhou since 2013.
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How the factory got here
Dates you can check against a registration record or an audit report — which is the only kind of company history worth putting on a website.
| Year | Milestone | What you can check |
|---|---|---|
| 2013 | Lock manufacturing starts in Wenzhou | The production base is still on the same site today |
| 2016 | Wenzhou Mingsheng Security Technology Co., Ltd. is formally registered | Registration date: 17 February 2016, Wenzhou, Zhejiang |
| 2020–2022 | Die-casting and laboratory capacity added | Six die-casting machines and in-house corrosion testing |
| 2023 | CE-RED certificate issued for the Bluetooth padlock (model 916) | Certificate reference and issue date on the certificates page |
| 2025 | SGS on-site verification completed | 30 October 2025, covering capacity, quality control and social responsibility |
| Today | 5,000 m², 100+ staff, 40+ machines | 300,000 lock and key-box units a month, quoted per order |
A long history is not a quality claim. What you can audit is a registration date, an audit date and the records that came out of them — ask for those instead of asking how long a supplier has been in business.
Quality system
Control at every stage, records you can ask for
Our management system is certified to ISO 9001:2015. Every batch undergoes documented inspection, and each product is checked by hand for surface and function before packing.
Incoming material
Raw material inspected against the specification, with batch records kept.
In-process
Checked at each production stage — not only at the end of the line.
Final inspection
Full inspection, sampling, or an inspection plan you specify.
First Article Inspection
Dimensions, finish and fit confirmed before the full run.
Packing and pre-shipment
Quantity, packaging and labelling verified; photos and video sent for your approval.
Testing capability
- Lock durability and cycling
- Tensile and impact load on shackle and mechanism
- Humidity and temperature ageing
- Salt spray corrosion resistance
- Optical inspection for surface and dimensional defects
Testing parameters and reports are specific to each product. We confirm what applies to your SKU rather than transferring one product's data to another.
Certification and compliance
What we hold, and what it does and does not mean for a North American project.
On file
- SGS-verified supplier
- ISO 9001:2015
- CE
- UKCA
- RoHS
- REACH
- CPR
- ISO 9227
Our most recent SGS on-site verification was completed on 30 October 2025, covering production capacity, quality control and social responsibility indicators.
IMPORTANT BOUNDARY
ISO, CE, UKCA, CPR, RoHS and REACH are not equivalent to US ANSI/BHMA, UL, fire, electrical or local building-code requirements. Where your project needs a specific standard, tell us which one and we will confirm what documentation applies.
No report exists for a product, we say so — we do not convert an unrelated certificate into a compliance claim.
What we do for buyers
Five things that decide whether a self-storage order runs smoothly — and where we take responsibility.
- Fit verification
- We confirm cylinder size, shackle and door compatibility with a physical sample, so you are not guessing from a drawing.
- Customization
- Laser logo, serial numbers, custom colors, blister cards and printed packaging.
- New mold development
- Tooling cost quoted separately and confirmed before development starts.
- Documentation
- Spec sheets, artwork proofs, inspection records and batch traceability.
- Delivery
- EXW, FOB, CIF or DDP, with customs documentation and HS codes.
- Replacement supply
- A re-order path so a cylinder ordered in three years still matches the original keys.
Frequently asked questions about Self Storage Lock
Are you a factory or a trading company?
We are a lock manufacturer. Wenzhou Mingsheng Security Technology Co., Ltd. operates a 5,000 m² production and warehouse facility in Wenzhou, Zhejiang, with 100+ staff and 40+ machines. You are welcome to audit the factory on site or review our SGS verification report.
What is your development history?
The Self Storage Lock brand started in 2013 in Wenzhou, where our manufacturing base remains today. The company was formally registered in February 2016, added die-casting and laboratory capacity through 2020–2022, and passed the most recent SGS on-site verification in October 2025.
Who takes responsibility for my order?
A single named contact handles your enquiry from specification through shipment, backed by a 12-person customer service team. Escalation goes to management, not to a general inbox.
Do you only make self-storage hardware?
Our production base also makes door locks, handles and key boxes. For this programme we supply the self-storage hardware families listed on this site — disc padlocks, cylinder locks, combination locks, latches, hasps and overlock hardware.
How large is the site, and what is made on it?
The facility covers 5,000 m2 and holds every production stage on one site, from metal casting through to the packed carton. Keeping those stages together is what makes an inspection record traceable back to the batch it came from.
Do you hold patents or registered designs?
Yes, eight patents and three registered trademarks. They cover specific mechanisms and designs rather than the whole range, and we will say which ones apply to the model you are considering.
Ready to see the operation for yourself?
The fastest way to judge a supplier is to look at the floor, the inspection bench and the packing station. We will arrange a live video walkthrough or an in-person visit.