Quick Answer: The best metal detector coil cover for most detectorists is Garrett’s 8.5x11 DD Coil Cover ($12.95) — it matches the stock coil on the ACE 300, ACE 400, and AT Pro, the machines most beginners already own. Minelab owners should match their own machine instead: the EQX 11 Skidplate ($20-$26) for the Equinox line or the M9 Skidplate ($20-$26) for the Manticore, while Nokta Simplex owners want the SX28 11” cover ($18-$27). A stretch-fit universal sleeve ($12-$16) is the fallback if your exact coil size isn’t covered by a brand-specific option.
A coil cover is the cheapest piece of insurance in this hobby, and it’s also the accessory most new detectorists skip entirely until their coil’s underside is already scarred from a season of dragging across gravel and roots. Below are five real options — one per major brand plus a universal fallback — so whatever’s on the end of your shaft right now has something protecting it.
Our top picks at a glance
| Cover | Best for | Fits | Price | Rating |
|---|---|---|---|---|
| Garrett 8.5x11 DD Coil Cover | Best overall / cheapest | Garrett ACE 300/400, AT Pro (8.5"x11" DD) | $12.95 | ★★★★★ |
| Minelab EQX 11 Skidplate | Best for Minelab Equinox | Equinox 600/700/800/900 (11" coil) | $20-$26 | ★★★★★ |
| Nokta SX28 11" Coil Cover | Best for Nokta Simplex | Simplex, Simplex+, Simplex Ultra (11" DD) | $18-$27 | ★★★★☆ |
| Minelab M9 Skidplate | Best for Minelab Manticore | Manticore stock coil (9" DD) | $20-$26 | ★★★★☆ |
| Zorvayne Universal Coil Protector Sleeve | Best universal / stretch-fit | Most 9"-15" coils, various brands | $12-$16 | ★★★☆☆ |
1. Garrett 8.5x11 DD Coil Cover, Black — Best Overall
Garrett 8.5x11 DD Coil Cover, Black
- Direct-fit replacement cover for the 8.5"x11" DD coil that ships stock on the Garrett ACE 300, ACE 400, and AT Pro.
- Snap-fit mounting tabs match the factory hardware — no drilling or trimming.
- Genuine Garrett accessory, not a third-party reproduction.
If your detector is a Garrett ACE or one of its close relatives — our ACE 400 review covers the 8.5”x11” DD coil in detail — this is the cover to buy first, and at $12.95 there’s no real reason to skip it. Since the ACE series is coil-only waterproof rather than fully submersible (per Garrett’s own published specs), the cover is doing double duty here: shielding the housing from abrasion and keeping grit out of the seam where the coil meets its waterproofing.
While you’re outfitting the rest of your kit, try Prime free for 30 days — free two-day shipping means a $12.95 cover actually arrives before your next weekend hunt instead of sitting in a cart for a week.
2. Minelab EQX 11 Skidplate — Best for Minelab Equinox
Minelab 11" EQX 11 Search Coil Cover Skidplate
- Purpose-built skidplate for the 11-inch EQX11 coil that ships on the Equinox 600, 700, 800, and 900.
- Genuine Minelab part — matches the factory mounting points exactly.
- Covers only the main 11-inch coil; the bonus 6-inch EQX06 coil included with the 900 uses its own smaller cover.
Our Minelab Equinox 900 review covers why the stock 11-inch EQX11 coil is the workhorse most Equinox owners swing every hunt, and at $20-$26 (Digging It Detectors / Kellyco listings, 2026) this skidplate is priced to match a machine that already costs $699-$999. Since the Equinox line is IP68-rated to 5 m, the cover’s main job here isn’t waterproofing — it’s protecting the coil’s paint and housing from the scrapes that come with wading rocky creek beds and tide lines the machine is built to handle.
3. Nokta SX28 11” Search Coil Cover — Best for Nokta Simplex
Nokta SX28 11" Search Coil Cover
- Fits the 11-inch DD coil (SX28) that ships stock on the Simplex, Simplex+, and Simplex Ultra.
- Full-coverage snap-on design guards against rocks, roots, and debris during aggressive hunting.
- Comes with complete mounting hardware — no separate screw kit to source.
The Simplex Ultra ships with an 11-inch DD coil and a full IP68 rating on the entire control box, not just the coil — one of the few budget machines matched against Minelab’s own submersion rating. At $18-$27 (Forest City Metal Detectors / Detector Warehouse listings, 2026) the SX28 cover costs less than a tenth of the $299 machine it protects, and since Nokta markets the Simplex line hard toward beach and creek hunting, a cover that keeps grit out of the coil seam earns its price fast in that kind of use.
4. Minelab M9 Skidplate — Best for Minelab Manticore
Minelab 9" Skidplate Coil Cover for Manticore (M9 DD)
- Direct-fit skidplate for the Manticore's stock 9-inch M9 DD coil.
- Genuine Minelab part in the same $20-$26 range as the Equinox line's own skidplates.
- An 8" M8 version is also sold separately for detectorists who've swapped to the smaller optional coil.
Our Manticore review covers the roughly $500 premium the Manticore commands over the Equinox 900 for its faster processor and 2D target-trace display — a $1,499 flagship that deserves the same $20-$26 skidplate protection as Minelab’s cheaper Equinox line. If you’ve swapped to the smaller optional 8” M8 coil for tight sites, buy the matching M8 skidplate instead; the two aren’t interchangeable.
5. Zorvayne Universal Coil Protector Sleeve — Best Universal / Stretch-Fit
Zorvayne Coil Protector Sleeve (Stretch-Fit)
- Stretch-fit fabric sleeve rather than a rigid snap-on shell, so it accommodates a range of coil sizes roughly 9"-15" across brands.
- Useful as a backup cover or for older/off-brand machines with no dedicated skidplate on the market.
- Check the stated size range against your coil's exact dimensions before buying — fit is the main variable on generic covers.
Not every coil has a brand-specific cover on the market — older Fisher, Tesoro, and Bounty Hunter machines especially — and this is where a stretch-fit universal sleeve earns its place on the list. It won’t seat as tightly as a purpose-molded skidplate, so expect slightly more give during aggressive swinging, but at $12-$16 it beats hunting with an exposed coil while you wait for the right brand-specific part to ship.
Coil covers by the numbers
- Garrett’s 8.5x11 DD Coil Cover prices at $12.95 (Amazon listing, 2026) — under 4% of the $357.99 ACE 400 it protects.
- Minelab’s EQX 11 and M9 skidplates both run $20-$26 (Digging It Detectors / Kellyco listings, 2026), a consistent price across the brand’s coil-cover lineup regardless of machine tier.
- Nokta’s SX28 11” cover runs $18-$27 (Forest City Metal Detectors / Detector Warehouse listings, 2026) for the same 11-inch DD coil that ships on the $299 Simplex and the $999 Simplex Ultra.
- A cracked coil housing is a common cause of moisture reaching the internal windings — the failure most often mistaken for a bad coil when a $12-$27 cover would have prevented it.
How to choose a coil cover
- Match the cover to your exact coil, not just your detector brand. Minelab alone sells separate covers for its 6”, 9”, and 11” coils — buying the wrong size means a loose fit that traps debris underneath instead of shedding it.
- Buy the genuine brand-specific cover when one exists. It’s molded to the exact housing shape and factory mounting tabs, and it’s rarely more than $10-15 above a generic universal sleeve.
- Reach for a universal stretch-fit sleeve only when no dedicated cover exists for your coil — older or off-brand machines, mainly — and double-check the stated size range first.
- Replace at the first sign of through-wear, not total failure. A thin spot or crack at a mounting tab means the housing underneath is now taking direct impact.
- Don’t skip it because your detector is waterproof. An IP68 rating protects against submersion, not the physical abrasion of dragging a coil across rocks and roots all day — that’s the cover’s job.
The bottom line
Match the cover to the coil you actually own: Garrett’s $12.95 8.5x11 DD cover for an ACE 300, ACE 400, or AT Pro, Minelab’s $20-$26 EQX 11 or M9 skidplate for an Equinox or Manticore, and Nokta’s $18-$27 SX28 cover for any Simplex model. If nothing brand-specific fits your machine, a $12-$16 universal stretch-fit sleeve is a reasonable stand-in until one does. Whichever you pick, it’s the cheapest protection in the hobby against a coil repair or replacement that costs many times more. For the rest of a complete setup, see our full accessory guide, and for keeping what you dig up safe once it’s out of the ground, check our best relic display case guide.