OutsideSingle Cylinder Deadbolt
Keyed outside deadbolt with inside thumbturn.
Finish
Satin Steel
Deadbolts Adelaide
Deadbolts add a strong locking bolt to compatible external doors, usually above a knob or lever handle. Lock Masters installs and replaces deadbolts, matches finishes, and helps choose the right cylinder setup.
- Keyed outsideKey access from the outside face.
- Inside thumbturnTurn from inside without using a key.
- Knob or lever comboWorks with entrance knobs and levers.
LOCK OPTIONS
Deadbolt options
Compare the common options below and select a model to add it to your request. We will confirm door compatibility, finish and next steps before quoting.
OutsideOutsideDouble Cylinder Deadbolt
Deadbolt with key operation on both sides of the door.
Finish
Satin Steel
What are deadbolts used for?
Deadbolts are used with a door knob or lever when the door needs stronger security than the latch alone can provide.
They add a solid locking bolt for higher entry protection while the handle set manages everyday opening and closing.
Entry door combo
Adds stronger security above a knob or lever latch.
Stronger bolt lock
Uses a solid bolt for higher entry protection.
Controlled access
Keeps entry control tied to approved keys.
How to choose the right deadbolt
Deadbolt selection depends on door preparation, cylinder type, inside operation, keying needs, finish and whether glass is near the door.
Check the door setup
Check backset, bore holes and door thickness before choosing.
Choose cylinder type
Choose inside snib control or double cylinders near glass.
Confirm the finish
Match the finish to the door and nearby hardware.
Common reasons to replace deadbolts
Most requests to replace deadbolts begin with worn hardware, lost keys, changed access needs, or a lock that no longer works reliably.
Loose or failing deadbolt
Replace when deadbolt repair is not practical.
Hardware upgrade
Upgrade worn deadbolts before sale or renovation.
Wrong function
Switch to the deadbolt type that suits the door.
Key control changed
Replace keyed deadbolts when rekeying is not practical.
How it works
Setup checked
Door and bolt assessed.
Option confirmed
Function and finish confirmed.
Ready to use
Deadbolt tested and working.
Rated 5.0 on GoogleRated 5.0 on Google
146 reviewsVerified
Anders Bogdanowicz
Aug 2026
Verified Google review
Excellent service, solved my issue quickly
Tanya Kaliszewski
Aug 2026
Verified Google review
Arrived quickly and fixed our lock efficiently. Works better than before. Thank you very much!
T M
Aug 2026
Verified Google review
Quick phone back and 2 mins to unlock the door. Will use again and recommend
Service area
Across AdelaideAll of metro Adelaide
Type your suburb or postcode and we'll confirm arrival time.
Frequently asked questions
Quick answers about deadbolt compatibility, repair, replacement, cylinder types, keying and finishes.
Need help choosing?
Select a model above or send a general request. We will confirm the door, hardware and best option.
Free lock help
Compare lock types, functions and finishes before you choose.
Fit check
Photos help us check fit and installation options.
Clear quote before work
We confirm the recommended option and price before booking.
Smart lock upgrade
Considering keyless access?
View electronic locks with keypad or smart access for suitable doors.
View electronic locks