SC1 and SC4 are separate model-specific 2-in-1 pick and decoder tools in the Lockly catalog. The practical purchasing difference is their listed application: SC1 is listed for compatible Schlage 5-pin keyways, while SC4 is listed for compatible Schlage 6-pin keyways. A Schlage name on the door hardware does not establish which tool your cylinder needs.
SC1 vs SC4: a quick comparison
| What to compare | SC1 | SC4 |
|---|---|---|
| Listed application | Compatible Schlage SC1 5-pin keyways | Compatible Schlage SC4 6-pin keyways |
| Tool type | 2-in-1 pick and decoder | 2-in-1 pick and decoder |
| Material listed | Stainless steel | Stainless steel |
| Product details | Compare the SC1 tool | Compare the SC4 tool |
These are tools, not replacement keys, lock cylinders or complete door locks. The applications above summarize the current product listings; they are not a universal fit guarantee.
Which model should you buy?
Choose SC1 when the cylinder specifications match the SC1 5-pin application stated on the product page. Choose SC4 when they match the listed SC4 6-pin application. Verify the exact keyway, pin configuration and full model marking together before ordering.
If you only know the door-hardware brand, you do not yet have enough information to establish fit. Consult the cylinder documentation or ask the person responsible for its maintenance to confirm the specification. A replaced cylinder may differ from the hardware around it.
Can SC4 replace SC1?
Do not assume that a six-position tool automatically replaces a five-position model. This store lists SC1 and SC4 separately, and does not promise interchangeability. Check documentation for the exact tool version and cylinder rather than selecting by length or appearance.
One tool or an SC1 and SC4 bundle?
A single model is useful when you have one confirmed application or are replacing a tool you already own. If both listed applications are relevant, compare the residential tool bundles and select the option naming SC1 and SC4. The selected bundle determines which tools are supplied; a two-tool option does not include all four residential models.
Compare the current product prices, included models and final shipping before checkout. Read the single tool versus tool set checklist for a broader purchasing comparison.
Before placing an order
- Record the exact cylinder keyway and pin configuration.
- Match the full model marking with the product listing.
- Check whether you are ordering a single tool or a selected bundle.
- Review shipping details and return terms.
- If a specification is unclear, send the product link and known cylinder details through Contact Us before purchasing.
Related buying guides
For Kwikset profiles, see KW1 vs KW5. For a four-model overview, read the KW1, KW5, SC1 and SC4 buying guide. Browse all residential and padlock picks and decoders or return to the Lockly Learning Center.
Use tools only on locks you own or have explicit permission to service. This guide explains product selection, not lock-opening procedures.