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Ultion is widely recognised as the most secure euro cylinder lock available on the UK market today. Developed and manufactured in Britain, Ultion locks have been engineered specifically to defeat every known method of cylinder attack — including snapping, bumping, picking, drilling, and pulling. What sets Ultion apart from other high-security cylinders is its patented lockdown mode: if the lock detects an attack, an internal mechanism activates that locks down the cylinder completely, making it impossible to turn or manipulate. This means that even if a burglar manages to snap the outer section of the cylinder, the lock remains secure and the door stays shut.
Ultion holds the Sold Secure Diamond rating, the highest security accreditation awarded by the independent testing body Sold Secure. It has also been awarded the coveted Secured by Design accreditation from the UK police, meaning it meets the security standards recommended by law enforcement for residential properties. Every Ultion lock is insurance-approved, satisfying the requirements of all major home insurance policies. For homeowners who want the very best protection for their property, Ultion is the lock Karen recommends most frequently.
One of the standout features of Ultion is the £2,000 break-in guarantee. If a burglar breaks into your home through an Ultion-protected door by defeating the Ultion cylinder, the manufacturer will pay you £2,000. This guarantee is automatically included with every Ultion lock — you simply register your lock online after installation. It reflects the manufacturer's confidence that this lock simply will not be defeated. Karen supplies genuine Ultion cylinders directly and fits them to your door, ensuring the lock is correctly sized and properly installed for maximum security.
In addition to supplying and fitting Ultion locks, Assist Locks provides a specialist key cutting service for Ultion cylinders. Ultion keys use a unique, patented key profile that cannot be duplicated at standard key cutting shops. Karen holds the specialist equipment and authorisation needed to cut Ultion keys accurately, so if you need spare keys for family members or lose a key, she can cut replacements quickly and affordably. Ultion cylinders are available in a range of finishes including brass, nickel, and black, and can be supplied in various sizes to suit different door and handle configurations. For broader security upgrades beyond Ultion, see our high security lock installation page.
Full range of high-security lock installations including British Standard BS3621 deadlocks, anti-snap cylinders, and 3-star cylinder systems for comprehensive property protection.
Expert repair and replacement of all door lock types. If your existing lock is damaged or faulty, Karen can assess whether a repair or a full Ultion upgrade is the best option.
Comprehensive residential locksmith services including emergency lockouts, moving-home lock changes, key cutting, and full home security assessments.
Not every locksmith carries Ultion stock or has the specialist key cutting equipment needed to service these locks. Karen is an authorised Ultion installer with the tools, training, and genuine stock to supply, fit, and cut keys for Ultion cylinders. She measures your door precisely to ensure the correct cylinder size, fits the lock to the manufacturer's specifications, and helps you register your £2,000 break-in guarantee. With over 15 years of locksmith experience and a genuine passion for home security, Karen is the Ultion specialist trusted by homeowners across west London.
Based in Isleworth TW7, Karen supplies and fits Ultion locks to homes across west and south-west London. Wherever you are, she is usually with you within 30 minutes.
Call Karen now for Ultion lock supply, fitting, and key cutting across Isleworth, Twickenham, and the wider west London area. No call-out fee, no hidden charges.
