Tool Trays: 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.

They disagree: Claude chooses Performance Tool and GPT chooses Ernst Manufacturing

In Automotive, Claude and GPT choose the same brand in 60 of 112 categories.

Claude Opus 5.5 · October 27, 2026

Performance Tool (brand)

Performance Tool's stainless magnetic parts trays are a simple, widely sold way to keep bolts and sockets from rolling off a fender or into an engine bay.

Not for: Anyone mainly working with aluminum, brass or most stainless fasteners, since a magnetic tray will not hold them.

GPT 6.1 Sol · November 10, 2026

Ernst Manufacturing Socket Boss (line)

Removable socket rails keep sockets organized and easy to carry between the toolbox and the vehicle.

Not for: Loose fasteners, bulky hand tools, or anyone needing a magnetic parts tray.

Check before you buy

Tray material. Prefer stainless steel over painted or plated mild steel Brake cleaner, fuel and oil strip paint and promote rust on cheaper trays, while stainless shrugs them off.
Magnet base covering. Magnet should be fully rubber- or vinyl-encapsulated A bare magnet scratches paint when the tray is stuck to a fender, hood or toolbox.
Fastener compatibility. Magnetic trays only hold ferrous parts; use a non-magnetic tray or bins for aluminum, brass and many stainless fasteners Non-ferrous hardware slides around and falls out of a tilted magnetic tray.
Size and shape. Small round dishes for one fastener group, larger rectangular trays for whole disassembly jobs Separating fasteners by component makes reassembly easier than piling everything into one large tray.
Rim height. Choose a deep raised rim if the tray will sit on sloped panels A shallow lip lets washers and small clips slide out when the tray is bumped or tilted.

Where to find Performance Tool

The Home Depot
Lowe's
NAPA Online

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

Performance Tool: Broad range of round and rectangular stainless magnetic trays.
Titan: Common budget stainless magnetic trays and bowls.
ARES: Sells magnetic trays and multi-compartment organizer trays.

What to avoid

Trays with an exposed, uncovered magnet base if you will set them on painted body panels.
Painted mild-steel trays for work involving solvents or brake cleaner.
Relying on a magnetic tray for aluminum or brass fasteners.

Questions

Will a magnetic tray hold stainless steel bolts?

Often not well: many common stainless grades are weakly magnetic or non-magnetic, so use a non-magnetic organizer for them.

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