Vandal Resistant 20”x20” Multipurpose Lock Box
The Vandal Resistant 20”x20” Multipurpose Lock Box is our largest, most heavy-duty enclosure—ideal for housing critical components in transit stations, correctional facilities, and industrial sites. Made in the USA from 12-gauge stainless steel, it features an integrated padlock shroud, conduit access, removable backplate, and is backed by a 10-year vandalism warranty. With nearly four square feet of internal space, this unit offers uncompromising security and capacity for high-risk, high-volume environments.
Warranty Guide, Care Instructions & Spec Sheet - See Spec Sheet Tab Below
When you need maximum internal capacity and maximum protection, the AA-MLB-20x20 delivers. As the largest model in our vandal resistant enclosure line, this multipurpose lock box is engineered for high-security environments where tamper resistance, corrosion protection, and flexible utility are essential. With an internal space of 20” x 20” x 4 ⅜” and a rear opening of 18” x 18”, this enclosure is ideal for critical electrical, communications, or infrastructure protection in public areas, transit systems, or correctional institutions.
Product Features:
- Vandal Resistant Design: Constructed from 12-gauge 304L or optional 316L stainless steel with TIG welds and de-burred edges to resist tampering and abuse.
- Made in the USA: Built to the highest standards using sustainable, LEED-compliant stainless steel.
- 10-Year Vandalism Warranty: Industry-best coverage on 12-gauge models for damage caused by tampering or forced entry.
- Integrated Padlock Shroud: Concealed lock area resists prying, cutting, and bolt cutters.
- Spray & Drip Deflective: Engineered to prevent rain or splash from entering the enclosure.
- Removable Backplate: Facilitates wiring and mounting access during installation while maintaining exterior integrity.
- Surface Mounted: Includes pre-drilled 3/8” holes for wall attachment (anchoring hardware not included).
- Conduit Ready: Supports ½” conduit connections up to 0.8" outside diameter for secure wire routing.
Dimensions & Weight:
- Exterior: 23” W x 20 ½” H x 4 ¾” D
- Interior: 20” W x 20” H x 4 ⅜” D
- Rear Opening: 18” W x 18” H
- Weight: 41.5 lbs
Material & Finish:
Choose from 12-gauge 304L stainless steel or marine-grade 316L for high-humidity or salt-exposed locations. All units are finished in a brushed Satin #4 finish for corrosion resistance and clean aesthetics.
Installation Guidance:
Install using 3/8” stainless steel fasteners appropriate to the wall or partition type (not included). For optimal strength, use back bracing of ¾” or more. Back-to-back through-bolt installation is recommended where applicable.
Warranty:
All 12-gauge models are backed by a 10-year vandalism warranty. If the enclosure is compromised through vandalism during proper use, we will repair or replace it — a level of confidence unmatched in the industry.
Flexible Applications:
The AA-MLB-20x20 provides secure protection for:
- Large-scale electrical and junction systems
- Telecom relay or emergency access equipment
- Lockout/tagout controls and key management
- Transit or correctional system communications
This unit’s large internal space and durable exterior make it an ideal choice when capacity, security, and longevity are essential.
Why Choose Vandal Stop?
Competing lock boxes from manufacturers like Bradley and Bobrick often use 18-gauge material and offer limited protection. Our 12-gauge stainless steel boxes offer over 2.5x the impact strength and are the only models backed by a 10-year warranty against vandalism. When your equipment needs to stay protected — Vandal Stop delivers.
Made to Order Items
All of Vandal Stop Products are made by hand in the USA using American-sourced stainless steel. While some products might be available in stock, most are made to order. Our general estimated lead times are:
- Quantity 1 - 10 = ~4 to 6 weeks for production
- Quantity 11 - 50 = ~4 to 8 weeks for production
- Quantity 51 - 100 = ~6 to 10 weeks for production
- Quantity 101 - 200 = ~10 to 16 weeks for production
- Quantity 200+ = Call for estimate
Winter Months Production
Due to holidays and winter weather, some production delays may occur during the months of November, December, January, and February.
Supply Chain
Due to increased demand, more time be required for production. If you have a critical delivery date requirement, please call or email to verify lead times prior to placing an order.
Stocked Items
For certain items that we sell often, we do our best to either keep inventory on the shelf or keep a constant production cue going. For items that are considered "stocked" we will generally be able to ship within 5 business days or less.
Why Are Stocked Items More Expensive?
We're adapting to your needs! While we specialize in made-to-order products, we recognize the growing demand for immediate availability. Adjusting to this requires foresight in demand anticipation, material procurement, initiating stock production, and warehousing—all incurring additional costs. Consequently, our stocked items are priced to reflect these overheads. For customers who can accommodate a production lead time, we're pleased to offer discounted pricing as a thank you for your flexibility.
Billing
Credit Card orders will be charged at the time of checkout. If you wish to be billed when your order ships, you can use the "Pay by Purchase Order" option on the payment section of checkout. You will be asked to upload a PDF copy of your Purchase Order along with a reseller certificate of tax exempt status is applicable. We will invoice you once your order has been shipped.
For more information, contact us or read our full Production Lead Times Policy.