80-Piece Magnetic Impact Nut Driver Set

What’s in the case

The count adds up to 80 metal pieces: 31 metric nut drivers spanning a marketed 5–17 mm, 25 SAE drivers across 5/32–3/4 in, 20 slotted, Phillips, Torx and hex bits, one universal socket adapter and three extension/adapters. The molded case with labeled compartments is extra — storage, not a working piece. Larger drivers are advertised as chrome-vanadium with a black-phosphate finish; Lowe’s and a marketplace vendor also mention Cr-V and S2 and manganese phosphate for parts of the set. Those are vendor specifications, not lab certificates, and no salt-spray or hardness figures exist. Every piece drives from your own tool through the 1/4-inch hex shank; this 80-piece set includes no ratchet, unlike some 41-piece variants on the same marketplaces.

Magnets and everyday use

The nut drivers use embedded magnets to hold ferrous hex fasteners, which pays off overhead — r/Tools owners repeatedly call 1/4-in and 5/16-in magnetic drivers useful for sheet-metal work. Two caveats. A buyer of a related multi-use kit reported that not everything in it was magnetic, so do not assume every cup holds its fastener. And the magnets collect steel shavings; owners complain about cleaning swarf out of magnetic hex cups, so expect to pick debris out now and then. Nobody has published a pull-force figure, a demagnetization life or a per-piece magnet spec. A driver that sheds a magnet that could jam machinery should be retired, not glued back together.

Warranty, parts and running costs

SedyOnline posts a 12-month manufacturer’s warranty from the purchase date, with photo or video evidence required for defects and replacement coverage running for the remainder of the original term. Approved returns through the maker’s store are free within 30 days, but the published return address is in Dandenong South, Victoria, Australia — worth knowing before you buy direct. There is no spare-parts catalog: no single 84099 metric driver, bit, extension or replacement magnet is sold, and SEDY’s separate 12-piece kit is a different assortment, not a parts bin.

Running costs are close to zero — the set draws no power and has no subscription or battery. What you might spend comes down to replacing rounded or broken bits and, in the worst case, a cracked case. A genuine set bought at the $39.99 eBay low (October 2026) that lasts four years with no replacements works out to about $10 a year; add two $5 replacement bits a year and you are near $20. Nobody has published a lifespan for the exact model, so treat those figures as arithmetic, not a forecast. If an adapter develops play, a shank bends or a magnet loosens, retire the piece rather than repairing it.

Is it worth it?

Prices move fast, so treat these as October 2026 observations. SEDY’s own store lists the 84099 at $74.99 and marks it backordered. eBay shows new 84099 offers from separate sellers around $39.99 to $60 and up; one $60.90 listing with free shipping ended October 14, 2026 and is history, not stock. Lowe’s new-releases feed showed about $60.78, though its product page hides the real number behind a ZIP check. Newegg carries an exact-model listing sold by a marketplace seller, but its page did not expose a reliable checkout price. Walmart had a similarly named 80-piece set at $69.99, out of stock, sold by a marketplace seller rather than confirmed SEDY.

On value: under $35 delivered is very appealing if the kit is genuine; $35–45 is the strongest band; $46–55 is acceptable for occasional use; above $65 is hard to argue while the maker’s $74.99 listing sits backordered. If you only turn a handful of sizes, smaller kits cover common work — the Klein Tools 32933 flip socket with six SAE hex sizes is $29 at DigiKey, and toolant’s 34-piece set is $49.99 direct with 60-day returns. For frequent impact work, Milwaukee’s SHOCKWAVE 32-piece combo is $67 at Home Depot with 90-day returns. For anything torque-critical, especially lug nuts, use a torque wrench — Tire Rack advises against impact-gun final tightening.

Bottom line: if you jump between SAE and metric hex fasteners and find the genuine 80-piece kit around $40, this is a practical box of bits. If you mostly drive a few sizes, buy fewer pieces from a brand with published impact ratings instead.

Which model this is

This page covers the SEDY 84099, also listed as SDY-84099 — a passive assortment of nut-driver attachments and bits, not a powered tool. Lowe’s sells it as item #105623344 under the retailer model string SDMY1-B0DKFFXQFQ, and Newegg lists model 84099 through a marketplace seller. “80-piece” in the marketplace title is the package size, not the brand.

Sources

Manufacturer:

• SEDY 80-piece magnetic nut driver set, SKU 84099 (SedyOnline)
• SEDY 12-month warranty terms (SedyOnline)
• SEDY refund policy and return address (SedyOnline)
• SEDY 12-piece magnetic nut driver kit — a different assortment (SedyOnline)

Retailers:

• Lowe’s SEDY 80-piece nut driver set, item 105623344
• Lowe’s new-releases feed snapshot
• Newegg SEDY 84099 marketplace listing
• eBay listing 206559124640, ended October 14, 2026
• Walmart 80-piece magnetic nut driver set — seller not confirmed SEDY

Owner reports:

• r/Tools on using magnetic nut drivers for sheet-metal work
• r/Tools 2022 discussion of magnetic drivers and magnet failures
• r/Tools on magnets detaching from other brands’ drivers
• TikTok Shop listing mixing 80-, 41- and 59-piece variant comments

Alternatives and guidance:

• toolant 34-piece magnetic nut driver set
• Klein Tools 32933 7-in-1 impact flip socket
• DigiKey listing for Klein Tools 32933
• Home Depot listing for Milwaukee SHOCKWAVE 32-piece set
• Tire Rack on torquing wheel lug nuts