QS6055/3AS Heavy Duty Adjustable Roller Bolt & Dead Bolt

QS Doorware QS6055/3AS Heavy Duty Adjustable Roller Bolt & Dead Bolt

The QS Doorware QS6055/3AS is an extra heavy-duty stainless steel mortice lock combining a silent-latching adjustable roller bolt with a dead bolt — engineered for high-traffic residential and commercial doors. The adjustable roller bolt allows for fine-tuning of the latch engagement, ensuring a smooth, rattle-free close. Available as a lock body only, or bundled with a compatible QS cylinder insert for a complete, ready-to-install solution.

Key Features

• Extra heavy-duty stainless steel mortice lock
• Silent latching adjustable roller bolt — smooth, rattle-free door close
• Dead bolt for added security
• 55mm backset
• 60mm centre
• Available as lock body only, or with a compatible cylinder insert
• 3–4 working day lead time

Specifications

• Model: QS6055/3AS/SS
• Function: Adjustable roller bolt + dead bolt
• Backset: 55mm
• Centre: 60mm
• Material: Stainless steel
• Cylinder: Not included (unless selected as a variant option)

Variant Options

• No Cylinder Required — Lock body only. Choose this if you already have a compatible cylinder or are sourcing one separately.
• Add QS1103 Cylinder — Includes the QS1103 cylinder insert for a complete, ready-to-install solution.
• Add Double Knob Cylinder — Includes the QS1108SN satin nickel double knob cylinder for dual-side key operation.

Frequently Asked Questions

What is an adjustable roller bolt? An adjustable roller bolt (also called a roller latch) is a spring-loaded latch that uses a roller instead of a traditional angled latch tongue. The roller reduces friction as the door closes, resulting in a quieter, smoother latching action. The adjustable feature allows the bolt projection to be fine-tuned for a precise fit.

What is the difference between a roller bolt and a standard latch bolt? A standard latch bolt has an angled face that slides against the strike plate as the door closes. A roller bolt uses a rotating roller, which significantly reduces noise and wear — making it ideal for doors that need to close quietly and reliably.

Do I need to purchase a cylinder separately? Only if you select the “No Cylinder Required” variant. If you already have a compatible euro profile cylinder, choose that option. Otherwise, select one of the bundled cylinder variants.

What backset do I need? The backset is the distance from the edge of the door to the centre of the cylinder hole. This lock has a 55mm backset — measure your door before ordering to confirm compatibility.

Is this lock suitable for exterior doors? Yes. The stainless steel construction and dead bolt function make it suitable for exterior residential and commercial door applications.

Delivery Information

At Doors Direct, we strive to make the delivery of your quality doors a seamless and convenient experience.

Nationwide Delivery:

Based in Durban, we extend our reach to bring our premium products directly to your doorstep anywhere in South Africa. Our efficient overnight transport ensures that you receive your order promptly.

Cost-Effective Options:

With a diverse range of transport service providers, we have the flexibility to secure competitive quotes, especially for bulk orders. Feel free to contact our office at 031 012 5033 to explore cost-saving options tailored to your needs.

Lead Times and Timely Delivery:

Our commitment to transparency is reflected in the lead times displayed on our website for made-to-order products. Once your order is dispatched, anticipate delivery within 24 – 48 hours, allowing you to enjoy your new doors without unnecessary delays.

Quality Assurance:

Doors Direct takes pride in delivering products that are undamaged and in excellent working order. While we make every effort to maintain the integrity of your purchase, we recognize that, on rare occasions, products may incur damage during shipping.

Damaged Products:

In the unfortunate event that your product arrives damaged, we have a straightforward solution. At our discretion, Doors Direct will either repair or replace damaged items. To facilitate this process, please ensure that the waybill is endorsed with details of the damages. For more details, refer to our comprehensive guarantee policy and terms and conditions at Guarantee Policy and Terms & Conditions.

Contact Us:

Have questions or need assistance? Contact our head office at info@doorsdirect.co.za or 087 012 5286. We are here to ensure your satisfaction at every step of the journey.

Thank you for choosing Doors Direct – Elevating your door-buying experience with quality, efficiency, and reliability.