🚗 Tired of swapping between tiny pads that can’t cover flat panels or big discs that won’t fit tight spots? Our 4-inch (100mm) hook and loop sanding discs are the perfect all-rounder for auto body, furniture, marine, and metalworking projects. From super coarse 60‑grit that chews through rust, welds, and stubborn paint, to fine 1000‑grit that leaves a silky pre‑paint finish, this complete range (60 to 1000) gives you predictable progression without gaps. Whether you're stripping a yacht deck, sanding hardwood floors, removing burrs from steel, or prepping a car door for primer – these discs deliver professional efficiency. The velcro backing fits any standard 4″ orbital sander or backing pad, and the multi‑purpose aluminum oxide grain works on metal (steel, aluminum, copper), hardwood, synthetic materials, and hard coatings. Get derusting, paint removal, and fine polishing from one reliable source. No guesswork, no wasted grits.
✨ Key Features – 100mm Hook & Loop Sanding Pads
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Complete Grit Range 60 → 1000 – Includes super coarse (60) for aggressive grinding, coarse (80‑150) for surface leveling, medium (180‑320) for secondary polishing, and fine (400‑1000) for high‑precision finishing. One set covers every stage.
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Hook & Loop (Velcro®) Backing – Quick‑change design fits all 4″ (100mm) random orbital sanders and backing pads. Instant disc swaps between grits, no sticky residue or tearing.
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Multi‑Material Versatility – Works great on steel, aluminum, copper, hardwood, synthetic materials (plastics/composites), hard coatings, varnish, gelcoat, and painted surfaces. Ideal for furniture, automotive, yacht, and general fabrication.
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Efficient Surface Preparation – Engineered for derusting, paint removal, burr elimination, and weld seam smoothing on complex flat or curved surfaces. The aluminum oxide grain stays sharp and resists loading.
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Professional Grade for Industries – Trusted by auto body shops, woodworking studios, marine repair yards, and metal fabrication shops. Low consumption, high safety, and repeatable results.
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Intuitive Grit Progression – Follow our simple guide: 40‑60 grit for stubborn surfaces, 80‑150 for rough shaping, 180‑320 for secondary smoothing, 400‑600 for fine polishing, and 800‑1000 for high‑gloss prep. No more confusion about which grit to use next.
❓ Frequently Asked Questions – 4″ Sanding Discs
🟢 Will these 100mm discs fit my orbital sander perfectly?
Yes – as long as your sander or backing pad uses a 4″ (100mm) hook‑and‑loop attachment system. Most standard random orbital sanders (e.g., 5″ or 6″ are common, but many detail and compact models use exactly 4″). Always check your tool’s pad diameter before ordering. For 5″ or 6″ sanders, you would need an adapter or a different disc size.
🧰 Can I use these discs for wet sanding (water or lubricant)?
These discs are optimized for dry sanding. The aluminum oxide grain and resin bond are designed for efficient dry use on paint, wood, metal, and coatings. For wet sanding (e.g., automotive clear coat or gelcoat polishing), we recommend our dedicated waterproof ceramic line. Using these with water may reduce disc life.
📦 How do I choose the right grit for my project?
Start with the coarsest grit that can remove the defect but not damage the substrate. For heavy rust/paint stripping → 60‑80 grit. For smoothing rough wood or filler → 120‑180. For secondary sanding before primer → 240‑320. For final surface prep before painting → 400‑600. For ultra‑fine finishing or between clear coats → 800‑1000. Always progress through grits step‑by‑step (no more than double the previous grit).
🚢 Are these discs suitable for marine / yacht gelcoat repair?
Yes – they work very well for sanding gelcoat, varnish, and fiberglass surfaces. Use 80‑150 grit for removing oxidation or heavy scratches, 240‑320 for smoothing, and 400‑600 for final prep before polishing. For best results on marine applications, keep the disc moving to avoid heat buildup and use a dust extraction system.
🧲 How long does the hook & loop backing last?
Our discs use high‑density loop material designed for hundreds of attachment cycles. To maximize life, keep your sander’s pad clean (dust and debris will clog the hooks), and peel the disc off gently rather than yanking. With proper care, the backing outlasts the abrasive grain itself.
⚡ Why do I need a full grit progression instead of just one or two grits?
Skipping grits leaves behind scratches from the previous coarse grit, which will show through paint or clear coat. Progressive sanding (e.g., 80 → 180 → 320 → 600) replaces deep scratches with finer and finer ones until they become invisible. Using our full range 60‑1000 ensures a professional, swirl‑free finish – especially important for automotive and fine woodworking.
⭐ Trusted by auto body pros, woodworkers & marine techs | Consistent grit progression | Fast shipping from US hub | Satisfaction focused
