Knowledge base · Technical note
Combination or keyed padlock for storage units?
This is not a product question, it is an operating-model question. The lock you choose decides who manages keys, who handles a lost key, and how much staff time a move-out costs.
The real question is who holds the key
Both locks secure the unit equally well for normal risk. The difference is operational:
- Keyed — the facility issues a key, tracks it, and recovers or replaces it.
- Combination — there is no key. The tenant sets or receives a code, and nothing physical changes hands.
Everything else follows from that one difference.
Choose keyed when you need manager access
A combination lock has no cylinder, so a manager key cannot open it. If staff need to enter units for inspection, maintenance or an overlock routine, keyed units on a master-key schedule are the workable option.
Many sites run both: combination locks on self-service units, keyed cylinders on units that staff need to reach.
Choose combination when you want zero key handling
Combination locks suit sites where the tenant truly self-manages. There is nothing to issue at move-in, nothing to chase at move-out, and no rekeying after a tenant leaves.
The trade-off is a support call. A forgotten code is a staff task, where a lost key is a replacement sale. Neither is free — pick which cost you prefer.
How each handles a move-out
| Event | Keyed | Combination |
|---|---|---|
| Move-in | Issue key, record it against the unit | Provide or set the code |
| Move-out | Recover key; rekey if not returned | Reset the code |
| Lost key / forgotten code | Rekey or replace the cylinder | Staff reset on site |
| Manager access | Yes, on a master-key schedule | No — not possible |
| Staff time per move-out | Key handling and possible rekey | Code reset |
The hybrid most facilities land on
In practice most operators end up with a mixed site: combination locks where the tenant self-serves, keyed cylinders where staff need access, and a written rule for which is which. Deciding that rule before you buy is what stops the mix from becoming a mess.
Confirm it on your own doors
Send a door photo, the cylinder size or the mounting dimensions. We confirm fit with a physical sample before you commit to a quantity.
What readers ask next
The commercial consequences of the operating decision.
Can we start keyed and move to combination later?
Yes, but treat it as a new order rather than a transition. The two models are not interchangeable on the same hasp once tenants hold combinations, so plan the change at a unit turnover point rather than mid-lease.
How many spares should we hold of each type?
A spare ratio works the same way for both, and it is a percentage of the unit count held on site. Give us the unit count and the first order can include the spares instead of them becoming a second purchase.
Does the choice change the lead time?
Both are made to order, and the production window is around 30 days. The keying step is what can move that schedule, so confirm the keying plan before production starts rather than after.