SEDY 84099 80-Piece Magnetic Nut Driver Set: problems, parts and running costs

Checked: 2026-10-18

Summary

The SEDY 84099 is a passive box of 80 magnetic nut drivers, screwdriver bits and adapters that runs off a drill or impact driver you already own — the set has no motor, battery or electrical parts. What usually goes wrong is packaging and small parts: buyers report cracked cases on arrival and magnets that arrive detached or shed later, and SEDY sells no individual spare drivers, bits or magnets. Running costs are close to zero — no power, subscription or consumables — and a genuine set bought around $40 works out to about $10 a year over four years, roughly $20 with two generic replacement bits a year; it is a good buy under $45 and hard to argue above $65.

Common problems and fixes

Cracked case on arrival — a verified TikTok Shop buyer of the 80-piece set got a cracked case with parts scattered in August 2026, and an owner of a 41-piece variant showed a damaged case. Photograph everything before the return window expires and ask for a complete-set exchange; SEDY’s 12-month warranty covers defects when photo or video evidence is sent. [14][2]
Magnets arrive detached or shed later — a buyer of a related 41-piece variant reported magnets arriving detached, and r/Tools owners describe magnets breaking out of other brands’ drivers after use. Check every magnetic cup on delivery and retire any driver that could shed a magnet into machinery rather than gluing it back. [14][13]
Magnets collect steel shavings — owners complain about picking swarf out of magnetic hex cups, especially after drilling and metal cleaning. Clean cups with nonabrasive tools and store the set dry to limit rust. [11][12]
No spare-parts catalog — SEDY sells no single 84099 driver, bit, extension or replacement magnet, and its separate 12-piece kit is a different assortment, not a parts bin. Replace worn pieces with generic impact-rated 1/4-inch hex accessories and retire bent shanks or adapters with play. [1][4]
“Impact driver set” is a bits-only title — there is no drill, battery or ratchet in the box; the 84099 count lists none, unlike some 41-piece marketplace variants. The 80 pieces are also not 80 unique sizes — many are length and reach variants of the same hex widths. [1][14]

Parts and consumables

Complete SEDY 84099 set (31 metric and 25 SAE drivers, 20 bits, 1 universal socket adapter, 3 extensions) — the only item with real street prices: about $39.99 on eBay (October 2026), $60.78 in the Lowe’s new-releases feed (October 2026), $69.99 at Walmart (October 2026, out of stock, seller not confirmed SEDY), $74.99 backordered at SEDY’s own store (October 2026). [8][6][10][1]
Screwdriver bits (20 in the set) — no named OEM replacement pricing; replace bits whose edges twist or chip with generic impact-ready bits. [1]
Embedded magnets — no official replacement magnet, part number or pull-force specification; do not glue a shed magnet back onto a driver used near machinery. [1]

Yearly running cost

The set is passive steel tooling — no electricity, battery or subscription — so the only running cost is replacement parts. Nobody has published a lifespan for the exact model, so treat these as arithmetic from observed prices, not a forecast. A genuine set bought at the $39.99 eBay low (October 2026) amortized over four years is about $10 a year; the same four-year math at SEDY’s backordered $74.99 listing works out to about $18.75 a year. Add the budget model of two $5 generic replacement bits a year and the total lands near $20 a year; a DIY owner who breaks nothing may spend $0 in parts. Excluded: the drill or impact driver that turns the bits, fasteners, shipping and tax.

When it is a good buy

Treat these as October 2026 observations from marketplace and big-box listings. Under $35 delivered is very appealing if the kit is genuine; $35–45 is the strongest band, and a $39.99 new eBay listing has been observed; $46–55 is acceptable for occasional use; above $65 is hard to argue while SEDY’s own $74.99 listing sits backordered — a $60.90 eBay listing with free shipping ended October 14, 2026 and is history, not stock. Alternatives: the Klein Tools 32933 flip socket ($29 at DigiKey, October 2026) covers six common SAE hex sizes and is the better choice when a few sheet-metal sizes do most of the work; the toolant 34-piece set ($49.99 direct, 60-day returns, October 2026) is the better choice for common sizes with a named seller; the Milwaukee SHOCKWAVE 32-piece combo ($67 at Home Depot, 90-day returns, October 2026) is the better choice for frequent impact work. For torque-critical work, especially lug nuts, use a torque wrench.