Anti-Snap vs Anti-Bump vs Anti-Pick | Which Threat Is Actually Worth Your Money

Walk into any locksmith supply catalogue and you'll find cylinders marketed as anti-snap, anti-bump, anti-pick, anti-drill, anti-extract, and about four other antis I've lost count of. It sounds reassuring. It mostly isn't, because the threats behind those labels are not equally likely, and buying a lock with the longest list of features isn't the same as buying the right protection for your door.

Here's what the evidence actually says, and what it means for a house in Richmond Hill, a flat conversion in North Sheen, or a letting property in St Margarets.

The Three Threats, Briefly Defined

Snapping is physical destruction of the cylinder. A burglar grips the exposed portion of the euro cylinder with mole grips or a snapper tool, applies rotational force, and the cylinder shears at its weakest point, usually just behind the cam. The whole process takes under a minute on a standard cylinder. Once it's snapped, there's no need for skill. The door opens.

Bumping uses a specially cut key, struck sharply with a blunt object. The kinetic energy briefly lifts all the driver pins simultaneously, and if the cylinder is turned at that precise moment, it opens. It requires a bump key that fits the keyway profile, moderate technique, and reasonable quiet. Not nothing, but learnable.

Picking manipulates each pin stack individually using a tension wrench and a pick. It's slow, skill-dependent, and leaves no visible damage. A locksmith uses it to get you back into your house. A burglar could use it, but they'd need both the tools and the patience.

What the Statistics Actually Show

The Office for National Statistics and Home Office burglary data consistently point the same direction: the majority of UK forced-entry residential burglaries involve physical force, not covert techniques. 'Physical force' in this context means snapping, drilling, or just kicking the door frame hard enough. The cylinder snap attack in particular became endemic on uPVC and composite doors once standard euro cylinders became near-universal.

The Metropolitan Police's own guidance, and the work behind the Sold Secure and TS007 standards, was largely driven by the scale of snap attacks. Bump and pick attacks do happen, but they're disproportionately associated with targeted, intelligence-led entries, commercial premises, or vehicles, not an opportunist working a street of terraced houses in Petersham on a Tuesday afternoon.

Priority order, bluntly:

1. Snapping, by a considerable distance
2. Bumping, real but much less common
3. Picking, rare in residential burglary; statistically close to noise

That doesn't mean you should ignore bump and pick. It means you should make sure you've addressed snap first, and then check whether your chosen cylinder also handles the other two, which the better ones do anyway.

How the Standards Map Onto This

This is where the specifications become useful rather than decorative.

A TS007 3-star cylinder, or better yet an SS312 Diamond-rated one, addresses all three attack methods in a single unit. Brands like Ultion, Avocet ABS, and Mul-T-Lock's MT5+ range are tested to these levels. You're not buying three separate protections. You're buying one well-engineered cylinder that happens to resist all three, because the metallurgy and pin stack design that resists snap also makes bump and pick harder.

A TS007 1-star cylinder with a 3-star handle and escutcheon plate combination can also achieve a 3-star door rating, but I'd rather see the cylinder itself rated. The escutcheon protects what's there; it doesn't change the fundamental engineering of the cylinder.

Which Lock for Which Situation

Standard uPVC or composite front door in TW9 or TW10: Snap is your primary threat. Replace a standard euro cylinder with a TS007 3-star or SS312 Diamond-rated cylinder. Ultion and Avocet ABS are well-priced at £35 to £65 fitted depending on size and whether you need a thumbturn version. This is the single most effective security upgrade most Richmond homeowners can make.

A rental property in Ham or Mortlake with multiple tenancies: Same snap priority, but also consider the cylinder's key control. Cylinders like Mul-T-Lock Interactive or certain Winkhaus keyways use restricted profiles that can't be copied at a high-street key cutter. Useful when you don't always know how many key copies are floating around.

A commercial premises in East Sheen or Kew with valuable stock: Now bump and pick start to matter more. Targeted attacks on commercial properties are a different risk profile. An SS312 Diamond cylinder on the main entry and a monitored alarm is a sensible combination.

A period property in Richmond Hill with a wooden door and a mortice lock: BS3621 five-lever mortice locks don't use euro cylinders, so the snap attack doesn't apply in the same way. The threat profile shifts to lever picking, which is where a good five-lever lock's anti-pick features earn their keep. Look for hardened steel bolt and anti-pick levers. ERA and Union both make solid BS3621 five-levers in the £60 to £90 supplied range.

The One Exception Where I'd Switch My Recommendation

If you live in a street where there's been a specific run of bump-attack entries, and it does happen occasionally in clusters, then a cylinder with a security pin configuration specifically designed against bump (spool pins, serrated pins, or a disc detainer mechanism) becomes worth prioritising alongside snap resistance. Check your local Neighbourhood Watch or Richmond Police SNT updates. Patterns do emerge and it's worth knowing your local picture.

Otherwise: snap first, always. The other two come along for the ride with any decent rated cylinder.

Don't Buy the Box. Buy the Rating.

A cylinder that says "anti-snap" on the packaging but carries no TS007 or SS312 rating has been tested by nobody except the marketing department. The TS007 3-star standard requires independent testing to Loss Prevention Certification Board criteria. SS312 Diamond is stricter still. Those marks mean something. A sticker on a blister pack does not.

Check the cylinder's documentation before fitting. If your locksmith can't tell you the rating of what they're installing, that's useful information about the locksmith.

If you're in Richmond or the surrounding TW postcodes and you're not sure what's currently on your door, Rapid Response can check it on a call-out, usually arriving within 30 minutes. Pricing is confirmed before any work starts. No pressure to upgrade anything; sometimes what's there is already fine.