High Security Locks Worth It | Stop Buying the Wrong Protection

Most people who've spent good money on a 'high security' lock have wasted half of it. Not because the lock is bad. Because it's solving the wrong problem.

Let me explain what I mean.

The attack that's actually happening

I had a job in Hendon last month. Tenant comes home, front door wide open, place turned over. The uPVC door looked almost untouched. No smashed glass, no kicked frame. Just a snapped Euro cylinder on the mat, a tenner's worth of kit, and about forty seconds of someone's time.

That's it. That's the attack.

Cylinder snapping is responsible for the vast majority of forced entries through uPVC and composite doors in the UK. The exact figures vary by police force, but Avon and Somerset put it at around 75% of all lock-related burglaries when they ran the numbers a few years back. Northumbria Police have flagged it consistently too. On the streets I work, Sunderland, SR1 through to SR6, Silksworth, Ryhope, Pennywell, it's the same story every time I attend a break-in. Snapped cylinder. Door open. Job done.

The criminal doesn't care how many pins are in your lock. He's not picking it. He's not bumping it. He grabs the cylinder with a pair of mole grips, gives it one sharp pull, and the cheap brass cylinder shears off at the weakest point. The cam inside flicks free. Door opens.

So when someone tells me they've just fitted a 'high security' lock with anti-pick, anti-bump, anti-drill pins, I ask one question. What cylinder is in it? Half the time, the answer is a standard Yale or ERA cylinder that cost about eight quid on Amazon. Anti-pick springs won't help you when the whole barrel is on the floor.

Why the marketing is upside down

Lock brands love advertising anti-pick and anti-bump because those words sound impressive and test well in focus groups. They're also genuinely useful features. I'm not saying they're worthless.

But bump attacks require a bump key, patience, and some skill. Picking a decent 5-pin cylinder takes time and practice. Snapping takes a bloke with no prior experience about thirty seconds. The threat model and the marketing are pointing in completely opposite directions.

When a Roker landlord asks me what lock to fit on a rental property, I don't start with anti-pick ratings. I start with: is this a uPVC or composite door? Because if it is, and roughly 80% of the doors I work on in Sunderland are, the cylinder is the single most important decision you'll make.

What actually matters, in order

Here's how I'd rank it if I were spending my own money:

1. A snap-resistant TS007 3-star cylinder. This is the thing that stops the attack that's actually used. Brands I'd fit without hesitation: Ultion, Avocet ABS, Mul-T-Lock MT5+. A decent Ultion 3-star cylinder costs around £50 to £70 supply and fit. That's your single best spend on any uPVC or composite door, bar none. The TS007 3-star rating means it's passed independent snap, pick, bump, and drill tests. Look for the kitemark.

2. Door reinforcement and shootbolt function. A good cylinder in a poorly adjusted door is still vulnerable. If the door doesn't pull tight against the frame, the multipoint lock can't fully engage all its bolts. I see this constantly in older properties around Millfield and Southwick. The door has dropped 5mm on the hinges and nobody's noticed. The shootbolts don't fire. The only thing actually locked is the single deadbolt near the handle. Get the door adjusted first.

3. Then, if you want to go further, look at the SS312 Diamond standard. This is the standard that Police and insurance underwriters actually recognise for full door security. It covers the cylinder, the lock hardware, the door leaf and the frame together as a tested system. A door and frame meeting SS312 Diamond is a serious deterrent. But you won't get there by putting a fancy cylinder in a rotten frame.

4. Anti-pick and anti-bump features. Yes, worth having. A 3-star TS007 cylinder includes them anyway. But they are not a substitute for snap-resistance, and they should not be your starting point on a uPVC door.

The obvious objection

Someone always says: 'But most burglars just kick the door in, so locks don't matter anyway.'

Partly true. Kick-ins do happen. But a door that meets PAS24 with a decent multipoint lock and a reinforced frame resists a kick far better than a flimsy one. And cylinder snapping is specifically used on uPVC doors precisely because kicking them doesn't work as well as it does on an older wooden door. The criminals have adapted. The spend priorities should too.

The one fair caveat

If you're on a timber door, the calculation shifts slightly. Snap attacks are less common on traditional mortice setups. On those, a BS3621 or BS8621 deadlock from a reputable brand, Fuhr, Mul-T-Lock, GU, becomes the priority, and anti-pick quality genuinely matters more. But the majority of homes built or refurbished in Sunderland from the mid-1990s onwards have uPVC or composite doors. If that's you, snap-resistance first, everything else second.

The bottom line on where to spend

A £150 'high security' lock with inferior cylinder protection is worse value than a £60 Ultion fitted properly in a well-adjusted door. The snapping attack doesn't care about your marketing literature. It cares about the metallurgy of the cylinder at the point it exits the door face, and whether there's enough anti-snap section to defeat a pull.

Stop buying the wrong thing. Get the cylinder right. Then worry about the rest.

If you're not sure what's in your door right now, pull the handle up and look at how much of the cylinder sticks out beyond the door face. More than 3mm of exposed barrel is a vulnerability on any uPVC door. If it's an old brass cylinder with no brand markings, it almost certainly won't resist snapping.

Locks Local covers Sunderland and the SR postcodes, from the city centre out to Boldon, Washington, Seaham, and Houghton-le-Spring. Most jobs we can be with you in under 30 minutes. We'll tell you exactly what cylinder you've got, what it'll cost to upgrade, and what the alternatives are, on the call, before we turn up. No commitment required.