Padlocks & Hasps: what Claude and GPT would buy

Two AI models chose on their own, with no web access. Nobody tested these products: this is what each one says, and how to check it.

Claude and GPT choose the same brand, ABUS, but not the same product

In Tools & Home Improvement, Claude and GPT choose the same brand in 24 of 53 categories.

Claude Opus 5.5 · October 28, 2026

ABUS Titalium 64TI (line)

A light, corrosion-resistant aluminium body with a hardened steel shackle and a decent cylinder suits most sheds, gates, lockers and toolboxes.

Not for: Anyone protecting high-value property from determined thieves with bolt cutters or grinders; buy a shrouded, boron-shackle high-security lock instead.

GPT 6.1 Sol · November 10, 2026

ABUS 83 Series 83/45

A rekeyable cylinder, solid brass body, and hardened steel shackle make it a durable, versatile choice for everyday security.

Not for: Maximum-security applications or situations requiring bolt-cutter resistance.

Which one fits you

high-security storage unit or trailer

ABUS Granit 37/80

A massive hardened body, a thick shackle and a pick-resistant Plus cylinder make it a serious deterrent where security matters.

Not for: Thin hasps or small staples that the thick shackle will not fit through.

cheap keyed-alike sets

Master Lock No. 5

A widely available laminated steel lock that is easy to buy in keyed-alike multipacks for low-risk uses.

Not for: Anything a thief would bother cutting or shimming, since its basic pin cylinder is easy to defeat.

Check before you buy

Shackle material and thickness. Hardened or boron-alloy steel shackle; thicker resists bolt cutters better, but it must still fit the hasp staple. Most padlock attacks are cuts to the shackle.
Double-locking shackle. Ball-bearing locking on both shackle legs. Single-sided spring latches can be shimmed or pried open.
Cylinder quality. Prefer disc-detainer or security pin cylinders over basic 4-pin wafer cylinders. Cheap cylinders can be picked or raked in seconds.
Weather resistance. Use brass, stainless or aluminium bodies with stainless shackles and drainage or covers outdoors. Corroded locks seize, and rust weakens hardened steel.
Match to the hasp. The lock and hasp should be similar in strength. A thief simply attacks whichever part is weaker.

Where to find ABUS Titalium 64TI

ABUS USA
ZenSupply
Walmart

Shops seen in search results on November 5, 2026. A shop missing here may sell it too. Nothing was checked by a person.

Brands that matter

ABUS: Broad range from everyday to high-security; the Granit and Diskus lines are well regarded.
Master Lock: Ubiquitous and good value; the ProSeries is far stronger than the basic laminated locks.
American Lock: Solid US-made commercial padlocks with good cylinders.
Squire: UK maker of hardened high-security padlocks.
Kryptonite: Specialist in bike and motorcycle locks and chains.

What to avoid

No-name zinc-body padlocks with unhardened shackles
Single-latch shackles that can be shimmed
Plain-steel locks left outdoors without weather protection
Strong locks fitted to flimsy screw-on hasps

Questions

Does a bigger padlock always mean more secure?

No. Shackle hardness, double locking and the cylinder matter more than body size, and the hasp is often the weak point.

What does keyed-alike mean?

Several locks open with the same key, which is handy for sheds and gates but means losing one key affects all of them.

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