Abloy Protec2: The Lock That Actually Deserves Your Trust.

Nearly every lock covered on this site — the ABUS 55/40, the Master Lock 140D, the Schlage B60N — shares one architecture. Spring-loaded pin stacks, a shear line, and a plug that turns when every stack is lifted to the right height.

That architecture has a structural weakness, and it isn't manufacturing tolerance. It's that the lock gives you feedback. Apply tension, and one pin binds before the others. Set it, and the next one binds. The mechanism tells you, one chamber at a time, whether you're right — which is the whole reason picking is possible at all rather than a brute-force search.

Security pins are an attempt to poison that feedback. Spools and serrated drivers create false sets, so the lock lies to you occasionally. It's a patch on the architecture, not a replacement for it.

The Abloy design doesn't patch it. It removes the architecture.

The disc detainer was invented by Emil Henriksson, Abloy's founder, in 1907, and first manufactured in 1918. Documented Abloy have been refining the same idea for over a century, and the Protec2 — which replaced the original Protec in 2012 — is the current end of that line.

Here's how it works, and why it matters:

• There are no pins. The cylinder contains a stack of rotating discs, nine or eleven of them depending on the model. Documented
• The key rotates rather than lifts. It is inserted and turned 90°, and angled cuts along its length rotate each disc to a specific angle.
• A sidebar, not a shear line. When every disc sits at its correct angle, a slot aligns across the whole stack and a sidebar drops in, freeing the plug.
• Washers between the discs ensure the key turns each one individually rather than dragging its neighbours.
• No springs anywhere. Which is why disc detainers dominate outdoor and utility applications — railways, substations, anything that lives in weather. There's nothing to seize with ice or grit.

The consequence for an attacker is severe. There is no binding order to discover, because nothing binds sequentially. There is no false set, because there is no set. Standard picks act on pins and there are none. Raking, bumping and comb attacks all assume pin stacks and are simply inapplicable.

Abloy layer further countermeasures on top — the Protec line adds a disc blocking system, and Protec padlocks use a disc steering system rather than the disc controller found in the cylinders. Documented Both exist specifically to frustrate the tools a disc detainer specialist would bring.

You will read, on a great many sites, that the Protec2 has never been picked. That is not true, and it's checkable in about thirty seconds, which makes it a bad thing to build a recommendation on.

Here is what the documented record shows: Documented

Seven years is the number. Not "unpickable" — seven years between a lock reaching the market and the first person filming themselves opening one, and even then only with a tool built specifically for the family.

Put that next to the rest of this site for scale. A Master Lock No. 3 rakes open in under a second. An ABUS 55/40 took our own yellow-belt author four to five weeks to open for the first time. The Protec2 took the global locksport community, collectively, most of a decade.

What this means for you specifically

Almost nothing, in the best possible way. The people who can open one are a handful of specialists with custom tools and years of practice on this exact mechanism, and they are not the people burgling sheds. As we argue throughout the site, picking barely features in real forced entry at all — and against a lock like this, it doesn't feature.

Manipulation resistance is only half of it, and on most locks the half that matters least. Protec2 padlocks are built around a case-hardened boron steel shackle with drill-resistant hardened inserts in the cylinder body. Manufacturer

The claim worth checking is the certification. Abloy Protec2 padlocks in the relevant models carry independent European ratings — Sold Secure in the UK and ART in the Netherlands — which are attack-based tests conducted by third-party laboratories rather than manufacturer self-declaration. Documented Ratings are awarded per model, not per brand, so the sensible move before buying is to check the specific model number against the certifying body's current listing rather than trusting a retailer's summary.

That last point matters more than it sounds. "Sold Secure Gold" on a product page means nothing unless it names the model, and the listings are public and searchable.

What no padlock at any price defeats is an angle grinder with time and no witnesses. Nothing on this page changes that, and any review claiming otherwise is worth closing. What high-security hardware buys is delay and conspicuousness — a grinder is loud, slow, throws sparks, and requires a person to stand at your door doing something obviously criminal for a long time.

Which is why, as with every other lock we cover, the mounting matters as much as the lock. A Protec2 on a hasp fixed with exposed screws is a very expensive way to protect a screwdriver-shaped hole. Same argument as the door frame guide.

Ask how most locks are actually defeated and the honest answer is rarely "picked." It's a key that existed and shouldn't have — a copy cut at a kiosk, a contractor who never handed one back, a tenant who moved out.

The Protec2 key system is patented and restricted. Blanks are not sold openly, cutting requires authorisation against a registered key card, and a hardware store cannot duplicate one. Manufacturer That converts key duplication from something anyone can do in five minutes into an administrative process with a paper trail.

This is the same argument we make about the ABUS 83/55 and its restricted cylinder options, and about the Schlage B60N, where a stock C keyway means anyone can cut a copy. Key control is the quiet half of high security and it's the half most reviews skip entirely.

The trade is real, though, and it belongs in the buying decision: you cannot get a spare cut on a Saturday afternoon. Lose your keys and you're dealing with Abloy's authorised channel, not a kiosk. For most people that's the single biggest practical reason not to buy one.

Buy it if

• The thing behind the lock is worth several times the lock. Plant, tools, a bike collection, a trailer, a business asset.
• You need key control that survives staff turnover. Restricted keys with a registration card are the point, not a side effect.
• It lives outdoors permanently. Springless mechanisms handle weather in a way pin tumblers don't.
• Someone might reasonably target it specifically rather than opportunistically.

Buy something else if

• It's a shed with garden tools in it. An ABUS 55/40 and a proper hasp cost a tenth as much and solve the actual problem.
• Bolt cutters are your specific worry rather than manipulation. Shape beats cylinder there — an ABUS Diskus is cheaper and better suited.
• You will lose the keys. Be honest with yourself. Restricted key systems are unforgiving.
• The hasp it hangs on is ordinary. Fix that first; it's cheaper and it's probably the weak point.

For nearly everyone reading this, the right answer is something in the budget roundup plus better mounting. The Protec2 is the correct lock for a real problem that most people don't have.

Most of this site is about locks that fail in ordinary ways — four pins where there should be five, a strike plate on short screws, a cylinder that opens to a rake in a second. The Protec2 is the other end of that spectrum, and the interesting thing about it isn't a marketing claim. It's a date.

A mechanism first patented in 1907, refined for a century, put on the market in 2012, and not publicly opened until 2019 — and then only by someone who had to invent a tool to do it. You do not need a claim of invincibility on top of that. The record is more impressive than the slogan, and unlike the slogan, it survives being checked.