The best-selling 3780 universal digital combination lock is an easy to use and versatile model that is available with a wide range of standard, optional and advanced features.

• Standard Finish: Black, Silver or White
• Fixing Options: Vertical, Left or Right-Handed
• User Modes: Public Mode, Private Mode or RAS (Available on Request)
• User Codes: 8-Digit Master Code, 6-Digit Sub-Master Code, 4-Digit User Code
• Spindle Length: 20mm or 24mm
• Steel Override Key (2-Keys Supplied per 50 Locks)
• LED Indicator Lights
• Audible Keypad
• Battery Condition Indicator
• Auto Unlock Mode
• 2x AA Batteries (Included)
• Up to 50,000 Cycles per Pair or Batteries

• Slam Bolt
• Door Open Alarm
• Alternative Colours
• Pre-Programmed Modes and Codes
• Customised Logo

• Product Code: 3780
• Series: E0355
• Body Height: 136mm
• Body Width: 37mm
• Body Depth: 27mm
• Cam Bar: 50mm with 5mm Crank

We believe you should always get outstanding value. If you receive a genuine like-for-like quote for the same product at a lower price, we'll beat it — no fuss. And it's not just about cost. When you buy from us, you're choosing one of the UK's most trusted locker specialists, with proven quality, expert advice, and reliable support built in. Competitive pricing, dependable products, and complete confidence, all from one place.

Alongside our premium products, we provide a fully insured installation service carried out by experienced professionals, you can be confident everything is fitted safely and performs exactly as intended. Whether you're installing lockers for the first time or upgrading existing units to modern, keyless systems, our team manages the full project end to end.

We install across a wide range of settings — from schools and leisure facilities to offices and public spaces — always working efficiently to keep distribution to a minimum. From early guidance and on-site installation through to final testing and sign off, we focus on delivering a neat, secure, and dependable result every time.

Delivery & Lead Times

This product is typically delivered within 2-3 working days from the date your order is confirmed. Delivery times may be slightly extended during busier periods, such as school holidays or seasonal shutdowns. If you need a more accurate timeframe, our team is happy to help — just start a Live Chat or call us on 01953 718221. We regularly review and update the lead times shown on our website to ensure they reflect current availability.

Returns & Cancellations

Please note that certain products, including many lockers and other made-to-order items, cannot be cancelled once manufacturing has begun. For items held in stock (such as most locks), cancellations may be accepted but could be subject to a restocking charge. If you're unsure what applies to your order, our customer service team can talk you through it, and full terms are available via the link below.

T's & C's