UL Door Hardware - danddhardware

Double Lock Cylinder Types

Single Lock Cylinder Types

Half Lock Cylinder Types

Bathroom Lock Cylinder Types

High Security Lock Cylinder Types

ANSI Lock Cylinder Types

The EN1303-Certified High-Security Lock Cylinder – Engineered for Ultimate Protection

D&D HARDWARE proudly presents a next-generation Euro cylinder, rigorously tested to EN1303 standards (100,000+ cycles) and EN1634 fire-resistant for 183 minutes—ensuring unmatched durability and safety for commercial and high-security applications.

Key Benefits for B2B Buyers:

EN1303 Certified – Withstands 100,000+ operational cycles, guaranteeing long-term reliability.
183-Minute Fire Resistance (EN1634) – Protects against fire spread, ideal for fire-rated doors.
Anti-Snap, Anti-Pick & Drill-Resistant – Defeats forced entry attempts.
B2B Bulk Supply & Customization – Available in multiple lengths, finishes, and keying systems (including master keying).

Ideal for:

Lock Cylinder EN1303

Lock Cylinder Manufacturer

EN1303 Master Key System Door Lock 7cm One Side Key Cylinder-DDLC001-70mm-SN

Lock Cylinders Supplier EN1303 Satin Nickel Solid Brass Door Lock Key Cylinder-DDLC004-70mm-SN

EN1303 Factory Price Euro Solid Mortise Double Open Door Lock Cylinder-DDLC003-60mm-SB

Bathroom Security 70mm Euro Brass Cylinder Lock Black Door Lock Cylinders-DDLC007-70mm-MB

EN1303 High Security Euro Profile Lock Cylinder Key Lock Cylinder-DDLC002

Solid Brass Half Cylinder Door Lock Thumbturn Cylinder 45mm for Wooden Door-DDLC009

Euro Hot Sale Products Half Cylinder Door Lock Single Open Key Lock Cylinder-DDLC010

ANSI Lock Cylinder

Amercian Standard Mortise Lock 6 Pin Schlage “C” Keyway Rim Cylinder-DDLC011

IC Core Cylinder Solid Brass ANSI 6 Pin Interchageable Core Cylinder-DDLC013

Rim Cylinder Small Format Interchangeable Core SFIC Lock Cylinder-DDLC015

Rim Cylinder Interchangeable Core Housing SFIC Housing Lock Cylinder for Lock-DDLC016

Rim Cylinder Solid Brass Construction Hardware Rim Lock Knob Lever Cylinder-DDLC017

Different Finishes Solid Brass Construction Hardware Rim Lock Cylinder-DDLC018

Cam Type Mortsie T Turn Lock Rim Cylinder in Solid Brass-DDLC019

Easy Thumb Turn Rim Cylinder with Thumbturn for Panic Devices-DDLC020

Amercian Style Brass 6 Pin Interchangeable Core Cylinder-DDLC013

High Security Cylinder

High Security Sollid Brass Double Lock Door Cylinder with Five Keys-DDLC023

High Security Brass Anti Snap Dimple Key Profile Door Lock Cylinder-DDLC022

High Security Solid Brass Double Open Door Lock Cylinder with Keys-DDLC021

High Quality Peanut Knob Lock Cylinder Euro Single Door Cylinder Lock-DDLC014

Brass Offset Double Cylinder Computer Keys Double Open Door Lock Cylinder-DDLC012

Factory Price Euro Market Solid Brass Mortise Door Lock Cylinder Oval Double Cylinder-DDLC008

Euro Brass Core Mortise Set Pin Door Lock Cylinder with Thumbturn-DDLC005

EN1303 Customized Euro Profile Brass Mortise Lock Cylinder-DDLC001-70mm-SN

Factory Price Euro Profile Solid Brass Mortise EN1303 Door Lock Cylinder-DDLC001-70mm-SN

Key Management Function - Master Keys For European Cylinders

Cylinders to differ are all operated by individual keys which are all different to each other.

All cylinders are operated by the same key. This gives an arrangement where one key can open a group of locks.

Each individual key opens its own lock and the common entrance.

Construction key can operate the cylinder during construction period.

After construction is finished , Master Key can insert the cylinder and change the pin combination.The construction key can't open the same cylinder lock any more.

The simplest master key system has two levels of keying and is considered the lowest level of master keying. The least powerful keys at the bottom are called change keys. Each one operatesonly one lock, or one group of keyed alike locks.The most powerful key at the top is called the master key.

Even the largest, most complicated keying systems for hospitals and universities can be broken down into pieces as they use this simple model.

A 3-level system is nothing more than two or more 2-level systems tied
together under a higher level key called a grand master key.

A 4-level system ties two ormore 3-level systems together under a higher level key is called a great grand master key.

Even though large jobs tend torequire more levels of keying than small jobs, most systems do not need more than 4 levels of keying.

ln a 4-level master key system,it is especially important to consider the traffic flow throughout the building.

One Master Key For All ANSl and European Cylinders

The simplest master key system has two levels of keying and is considered the lowest level of master keying. The least powerful keys at thebottom are called change keys. Each one operates only one lock, or one group of keyed alike locks. The most powerful key at the top is called the master key.

A 3-level system is nothing more than two or more 2-level systems tied together under a higher level key called a grand master key.

This is typically the highest level access for a master key system.A great grand level master key (GGGMK) has access to your entire organization, including facilities, locations, doors etc. This key can open all the access levels beneath it. Great grand master keys should be limited to a very limited number of stakeholders within your organization who need complete access. The fewer people who have high-level access to your company's physical locations, the more secure your master key system can be.

Can be Matched with Different Cylinder Thumbturn

Commercial Door Lock Cylinder

EN1303 Lock Cylinder Project

D&D fire rated door cylinder comply to ANSI,BHMA,UL and BS EN/CE, Suitable for Residential Building, Office Building,Education, Healthcare, Hotel, Government applications.We can supply international branded quality at factory cost with mechanical guarantee and after sales service.

Government

Education

Office Building

Healthcare

Commercial

Hotel

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