DOM ix TwinStar double cylinder 2-in-1

Producer No. 333TBixTwinStar-2in1
incl. VAT, excl. Shipping Cost
Delivery Time
2 - 3 weeks
factory profile
Please note that the delivery time may be extended for options marked with *!

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DOM ix TwinStar® double cylinder 2-in-1

"Two roles - double security"

With the ix TwinStar®, DOM once again demonstrates its comprehensive expertise in the field of mechanical locking technology. The new reversible key system is particularly well protected against unauthorised copying by a floating double roller in the key.

DOM ix Twinstar® is a secure locking system for all those looking for the highest quality. It meets the high requirements of VdS, DIN and SKG and can be used in residential buildings, offices or private companies. Thanks to a complex system - 11 spring-loaded locking elements, 10 of which are pin locking elements and 1 locking shaft locking element - it is suitable for private homes up to large buildings with high security standards.

2-in-1 system

This unique feature offers for registered single locks the possibility to easily recode the cylinders in your system! With 2-in-1, each cylinder has a integrated spare coding and comes with a second set of keys. If you suspect your security is compromised, simply insert a key from the second set into the cylinder, turn it over, and the first set immediately loses its locking function!

There are special variants for detached and semi-detached houses with optimum safety equipment.

Patent protection until 2036

Basic length:

  • from 30,5/30,5 mm
  • measured from the middle of cam
  • extension 5 mm per side
  • from a total length of 125 mm, the production is carried out in modular design

Technical characteristics:

  • high protection against manipulation due to 22-fold locking authorisation query
  • anti-bumping & anti-picking pins
  • drilling protection VdS B as standard
  • optional highest possible VdS class BZ (with modular design)
  • with emergency and danger function (closing on both sides)
  • up to 10 positively guided, solid profile control pins
  • 11 spring-loaded locking elements made of special brass or hardened steel on each locking side: 10 pin locking elements, 1 locking shaft locking element (controlled by a locking shaft function pin) offer high protection against manipulation against intelligent opening methods and impact protection
  • consisting of 20 narrowed core and body pins
  • axially spring-loaded and movable locking shaft technology
  • stainless steel locking shaft is actuated by a control pin positioned in the core
  • 13 mm core diameter
  • one-piece cam made of sintered steel
  • according to DIN EN 1303:2015-08, certified according to ISO 9001:2015
  • locking security class 6, attack resistance class C according to DIN EN 1303
  • 10 years DOM additional warranty if registered under DOM


  • cylinder body and cylinder core made of solid brass (high corrosion protection)
  • finish: dull nickel
  • reversible key system
  • horizontal key insertion
  • compatible with DOM electronics (made possible by integrating passive transponder technology into the key bow via clip tag)


  • key thickness: 2,6 mm
  • is delivered with a second set of keys
  • nickel silver reversible key: corrosion-free and low-wear
  • active copy protection: 2 independently movable rollers in the key tip (patented), each with a spring-loaded active function query, make it difficult to make duplicate keys
  • mobility detection of the rollers through labyrinth in the key channel
  • key tip with ramp for pin locking elements
  • trough bores with optimized angular cuts of the flank angles
  • complex coding in the key with known high-ribbed technology make it difficult to make duplicate keys
  • no key blanks available on the market
  • key blade length adapted to all common safety fittings
  • new key head design

Options / Special equipment:

  • different cylinder finishes (polished brass, oxidized bronze, matt black chrome)
  • increased drilling protection + modular design = VdS BZ (VdS*** / VdS security class 3)
  • weather protection
  • freewheel (on request)

Cylinder version:

Operational area:

  • interior doors, exterior doors, front doors, apartment doors with increased security requirements
  • single family houses with high protection requirements
  • apartment buildings
  • airports, educational institutions, financial buildings, residential buildings, hospitals, industry, hotel buildings
  • small to large office buildings/companies, industrial premises

Scope of delivery:

  • double cylinder incl. 2 x 3 or more keys
  • 1 fixing screw
  • Security card per each set of keys

2-in-1 system:

The DOM system is prepared at the factory for a second lock, which the customer can call up himself if required. The locking cylinder can be easily recoded with the second set of keys. A 360° turn in the cylinder - and the new lock is activated. The old keys are thus easily rendered ineffective.

  • 2 x 3 keys, 2-in-1 recodable
  • number of keys per key set selectable
  • with this option standard drilling protection VdS B, with modular design VdS BZ
  • Please note that this function cannot be reset! After the 1st locking with the 2nd key set, the 1st key set is deactivated forever!
2-in1 system
2-in-1 system

Reversible key with patented movable double roller

It may look like a normal key, but the ix TwinStar is the pinnacle in the evolution of DOM keys. Every technology, innovation and patent for mechanical security ever developed by DOM engineers has resulted in this unique reversible key. It features more complex copy protection technologies integrated into the key and more pins for more security and possible combinations. It also offers the highest level of user-friendliness due to the reversible technology.

Twin caster

It only looks like a small wheel, but the double role in the key of the DOM ix TwinStar is a really big deal. Not only does it make it almost impossible to copy the cylinder unless you have the right special tool, it also generates a large number of extra key combinations, making it a perfect addition to the security system. Best of all, it is still as easy to use as a regular reversible key.

DOM TwinStar key

Impact protection

The cylinder contains impact protection pins and other security elements that prevent access by impact keys to turn the inner pins.

Opening protection

The cylinder contains specially shaped unlocking security pins that prevent opening with the help of a lock pick.

Pulling protection

The cylinder contains a special cylinder core which prevents the cylinder from being pulled out by drilling into the core.

How to measure the cylinder length correctly?

You can also find help in determining the correct length in our Help Center for "Cylinder Gauge".

Drilling protection VdS BZ = high safety for special requirements

In cooperation with the police, VdS Schadenverhütung GmbH has developed a star system that divides mechanical locking systems into three different security classes, thus providing you with a quick overview of the respective security level.

  • recognition by VdS Schadesverhütung GmbH
  • VdS checks locking systems and awards recognition from A to BZ+
  • drilling protection VdS BZ = VdS security class 3
  • VdS BZ: increased protection against drilling and core pulling due to carbide pins in cylinder body and cylinder core arranged in several planes
  • this drilling protection variant is manufactured in modular technology with increased tear-off protection
  • modular design with 2-in-1 variant has drilling protection VdS BZ

Cylinder finishes:

  • finishes (polished brass, oxidized bronze, matt black chrome)
  • standard finish: dull nickel
  • for individual design requirements
  • if desired, homogeneous appearance of door cylinder and fitting
Please note:
If a different cylinder finish, different from the standard finish, is ordered, extended production times may occur.

DOM cylinder finish
dull nickel
DOM cylinder finish
polished brass
DOM cylinder finish
oxidized bronze
DOM cylinder finish
matt black chrome

Emergency and danger function (standard)

This function enables the locking cylinder to be blocked even if a key with blocking authorisation is inserted on the opposite side.

emergency and danger function

Seawater resistance:

  • for use in marine climate or salty atmosphere
  • fixing screw pure brass, cam sintered steel (chemically nickel plated)
  • cylinder finish: matt chrome
  • possible from cylinder length 30,5 / 30,5 mm
  • restrictions possible in combination with other optional equipment
  • in combination with freewheel: clutch not protected against seawater
DOM cylinder finish


The profile cylinders which have a freely rotating cam are designated as freewheel cylinders.
The cam can be moved freely through 360° when no key is inserted. DOM freewheel cylinders comply with DIN EN 18252:2006-12.
When the key is inserted, the spring-loaded clutch engages in the cam. This then allows the cylinder to be closed in the conventional way with the key.

  • from cylinder length: 35,5/35,5 mm
  • Usually only necessary for special panic or automatic locks. If in doubt, please check with the door manufacturer.
  • for multi-point locks with panic function: latch and bolt must be moved into the lock body when the door is closed with the handle. To ensure this, the cam must be able to turn freely.
  • in motor-driven locks and special escape door locks
  • restrictions possible in combination with other optional equipment
  • with this option the cylinder has no emergency and danger function
  • freewheel function is tested according to FZG (test guideline for profile cylinders with freewheel function for gear locks in escape door locks)

DOM offers you a free additional guarantee on this system in addition to the DOM guarantee with a total term of 10 years.
To do this, you must register with DOM within 1 month of purchasing the registered single lock.
You can find further information on this at DOM under the following link.

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