MUL-T-LOCK® MTL800 HERCULAR® The Ultimate High-Security Double Cylinder Deadbolt ANSI Grade 1 • UL 437 Listed • Restricted Key Control
Part No: KW-HD2-MTL800
Mul-T-Lock® MTL800 Hercular® Double Cylinder Deadbolt
Maximum Security. Professional Grade Protection.
The Mul-T-Lock® MTL800 Hercular® Double Cylinder Deadbolt is engineered for customers who demand the highest level of security for residential, commercial, and high-risk applications. Built on Mul-T-Lock’s advanced high-security cylinder platform, the MTL800 combines innovative key control technology, superior resistance to physical attacks, and unmatched durability.
Advanced Multi-Layer Security Technology
The MTL800 incorporates three independent locking mechanisms working together to provide exceptional protection against picking, bumping, and unauthorized key duplication:
- Patented Locking Bar Technology – A precision locking bar interacts with a unique milled pattern on the key, creating an additional layer of security beyond conventional pin tumbler systems.
- High-Precision Telescopic Pin System – Mul-T-Lock’s proven telescopic pin technology utilizes dual pin stacks for enhanced pick resistance and superior key control.
- Interactive Alpha Spring Technology – A patented movable element within the key engages a dedicated internal pin, creating an additional shear line and significantly increasing protection against advanced manipulation techniques.
Restricted Key Control
The MTL800 utilizes a reversible, double-sided high-security key designed for convenience and enhanced security. The key combines telescopic pin cuts with a proprietary milled pattern, providing exceptional resistance against unauthorized duplication.
Additional keys can only be duplicated by authorized Mul-T-Lock dealers upon presentation of the original key authorization card, helping ensure complete control over who can obtain copies of your keys.
Ideal for Master Key Systems
The MTL800 platform is designed to support small, large, and highly complex master key systems. Its advanced keying capabilities allow for hierarchical access control while maintaining the highest level of key security.
Applications
- Residential front entry doors
- Commercial buildings
- Retail storefronts
- Offices and warehouses
- High-value storage areas
- Multi-family and property management applications
Operation
A smooth 90° key rotation throws the heavy-duty 1” hardened steel bolt, creating a secure lock-up with the strike plate. Integrated hardened steel ball bearings provide increased resistance against jimmying and forced-entry attacks.
Construction
- Solid brass cylinder and housing
- Hardened steel deadbolt
- Hardened steel anti-drill components
- Heavy-duty steel strike plate
- Nickel silver and stainless steel internal pins
- Corrosion-resistant construction
Additional Features
- Adjustable for standard backsets
- Easy conversion between drive-in and square corner installations
- Heavy-duty 1” bolt throw standard
- Suitable for residential and commercial applications
- Long-lasting precision-engineered components
Security Ratings
✔ UL 437 Listed – High Security Cylinder
✔ ANSI/BHMA Grade 1 Certified
✔ UL Fire Rated Deadbolt
✔ Pick Resistant
✔ Drill Resistant
✔ Bump Resistant
✔ Restricted Key Duplication
Cylinder Mechanism
Mul-T-Lock’s advanced high-security telescopic pin tumbler system provides exceptional resistance against lock picking, drilling, bumping, and other common methods of attack while maintaining smooth, reliable operation for years of service.
When security matters most, choose the lock trusted by locksmiths, security professionals, and property owners worldwide — the Mul-T-Lock® MTL800 Hercular® Deadbolt.
Return and Refund Policy
Thank you for shopping at Golden Locks Inc.
If, for any reason, You are not completely satisfied with a purchase We invite You to review our policy on refunds and returns.
The following terms are applicable for any products that You purchased with Us.
Return, Cancellation & Special Order Policy
Golden Locks Inc. sells professional door hardware, security products, and custom-configured items.
Due to the nature of these products, the following policies apply to all purchases made through our website or store. By placing an order with Golden Locks Inc., the customer agrees to the terms outlined below.
Order Changes & Cancellation Policy :
• Customers may request order changes, modifications, or cancellations within 24 hours of placingnan order.
• Requests must be submitted by email to CS@GoldenLocksinc.com.
• After 24 hours, the order may already be processed, allocated from inventory, submitted to thenmanufacturer, entered into production, or prepared for shipment.
• Orders canceled after 24 hours are subject to a minimum 25% restocking and processing fee.
• Golden Locks Inc. reserves the right to refuse cancellation if the order has already been shipped, manufactured, customized, cut, keyed, or assembled.
Custom Orders / Special Orders (Non-Cancelable & Non-Returnable)
• Many products sold by Golden Locks Inc. are custom-configured or special-ordered directly from manufacturers.
• Examples include Emtek configured hardware, Hoppe multipoint trim sets, special finish hardware, multipoint lock components, keyed cylinders, and custom door hardware configurations.
• Once these orders are submitted to the manufacturer, they cannot be canceled, returned, or refunded.
Standard Return Policy (Stock Items Only)
• Return request must be submitted within 30 days of delivery.
• Product must be unused, uninstalled, and in original packaging.
• Approved returns are subject to a 25% restocking fee and deduction of original shipping costs.
• Customer is responsible for return shipping costs.
Non-Returnable Products
• Custom or special-order hardware
• Emtek configured products
• Hoppe trim sets and multipoint hardware
• Keyed locks or cylinders
• Cut keys
• Electronic locks once powered or installed
• Safes once delivered or installed
• Clearance or discounted items
• Items showing signs of installation
Shipping Claims (Damage or Missing Items)
• Customers must inspect shipments immediately upon delivery.
• Claims for damage, missing parts, or incorrect items must be reported within 48 hours of delivery.
• Customers must provide photos of the product, packaging, and shipping label.
Chargebacks & Payment Disputes
• Customers agree to the policies stated on this page when placing an order.
• Golden Locks Inc. may provide order confirmations, shipping confirmations, tracking information, and policy acceptance records to payment processors in the event of disputes.
Return Authorization Required
• All returns require a Return Merchandise Authorization (RMA).
• Unauthorized returns may be refused.
Product Page Notice (Recommended)
• This product may be custom ordered or configured to your specifications.
• Orders may only be canceled or modified within 24 hours.
• After 24 hours a 25% restocking fee applies.
• Custom and special-order items are non-cancelable and non-returnable once processed.
Contacting Us
Please contact us with as much information about your return request as possible. We will need:
- Your order ID.
- First and last name.
- Phone number : +1-800-385-7725
- The items you wish to return (if your order contains multiple items.)
- The reason for your return.
- Any relevant return details or images.
- By visiting this page on our website: https://goldenlocksinc.com/pages/contact-us
Not providing this information may delay your return.
Please email us at CS@GoldenLocksinc.com to authorize a return.
Return Address
Golden Locks Inc.
16371 Gothard Street, Suite G
Huntington Beach, CA 92647
United States
