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S4 Pro 4-in-1 Precision Resin Sander & Polisher

Regular price
$109.99 USD
Regular price
$109.99 USD
Sale price
$109.99 USD
    Description
    • POWERFUL 4-IN-1 RESIN POLISHING SOLUTION: One compact machine delivers the functions of a bench sander, bench polisher, tabletop grinder, and handheld sander. Save money, space, and effort—perfect for resin crafters seeking professional-level finishing results at home. It easily fixes small flaws like bubbles, burrs, scratches, excess resin on the injection ports, and uneven surfaces, ideal for resin shaping, sanding, and polishing. It also works on metal, glass, jade, jewelry, acrylic, ceramic, and wood.
    • COMPACT AND LIGHTWEIGHT: This resin grinding machine features a compact build: 7.74 x 1.73 inches (main unit) and 9.74 x 4.16 x 3.56 inches with the base. The lightweight, ergonomic design with a shock-absorbing sponge pad ensures comfortable one-handed use, even for long periods, perfect for resin enthusiasts (even with less strength) or beginners. Use it handheld for flexibility or mount it on the included base to free your hands and reduce wrist strain. The base’s suction cups provide stability and anti-slip performance, aiding in achieving perfectly flat resin surfaces.
    • WIRELESS FREEDOM + WIRED ENDURANCE: This resin grinding and polishing machine offers dual modes: Wireless (2 built-in 2000mAh batteries) provides ~1.5 hours of use (varies by speed/pressure) with Type-C charging for flexible, precise control. Wired mode (via adapter) suits batch grinding, ensuring long-lasting, uninterrupted work. Whether you need mobility or extended runtime, this epoxy resin sanding kit adapts to your workflow.
    • 3-SPEED SETTINGS + LCD SCREEN: The resin grinding machine comes with 3 adjustable speeds, powered by a high-torque motor. Low speed for fine grinding, high speed for large-area sanding—ideal for different materials and tasks. The clear LCD screen displays speed, battery level, and power mode, keeping you in full control. Rigorously quality-tested, this electric resin sander and polisher is durable and reliable, with a marine blue finish adding style to your workspace.
    • ALL-IN-ONE KIT: This resin sanding and polishing kit includes: main unit, base, 2" & 3" sanding discs, 3" grinding wheel, 3" cotton wheel, 2" & 3" sandpaper packs (various grits), manual, Type-C cable, and adapter. It has everything for immediate use—perfect for both coarse and fine sanding. Safety features: overheating alarm, overvoltage protection, and 4-minute auto-shutdown, ensuring safe operation.
    • WIDE APPLICATION RANGE: This epoxy resin sanding kit excels at sanding and polishing resin artworks like spherical resin pieces, 3D ornaments, resin jewelry, coasters, resin blocks, keychains, pyramids, and dice. Beyond resin, this grinding and polishing machine handles jewelry repair, metal polishing/rust removal, knife sharpening, paint touch-ups, debris removal, and surface polishing—making it a comprehensive toolset for diverse projects. ( Note: Not recommended for oversized resin river tables.)
    Shipping Policy
    • Free Shipping Over $30 for US.
    • All orders will not be accepted (except the USA), countries outside the USA may not able to place your order temporarily.
    • All US orders will be processed within 1-2 days (business days). Typical shipping time is are 2 - 5 business days.
    • Please refer to the Shipping Policy for more details.
    30 Days Returns & Refunds
    • We really hope you like your purchase from LET'S RESIN. And we gladly accept returns within 30 days of receipt for items in new condition.
    • Please refer to the Returns & Refunds Policy for more details.
    What's in the box

    Host * 1 pc
    Base * 1 pc
    Placement Platform * 1 pc
    Dust cover * 1 pc
    Adapter * 1 pc
    Instruction manual * 1 pc
    Type-C charging cable * 1 pc
    2-inch sandpaper disc * 1 bag
    3-inch sandpaper disc * 1 bag
    Grinding wheel * 1 pc
    Cotton buffing wheel * 1 pc
    2 inch buffer pad * 1 pc
    2-inch sandpaper * 1 pc
    3 inch buffer pad * 1 pc
    3-inch sandpaper * 1 pc

    User Manual
    FAQ

    ❓Sander Not Charging? 3 Quick Checks

    Running into charging issues? Try these three checks to get your sander back to work:

    • Check the Charging Port
      The DC IN port only powers the tool—it doesn’t charge the battery. Use the rear Type-C port instead. Also, look for dust, debris, or damage and clean carefully.
    • Check the Battery
      The sander needs some battery power to run, even when plugged in. If it’s fully drained, let it charge for a while to “wake up” the battery. Aim for at least 2 bars before use.
    • Check Power & Charger
      Test the outlet with another device. Inspect the charger for frayed wires or bent plugs. If needed, try a different one—but only use a Type-C (5V/2A) cable.

    ❓Using the DC IN Port — Won’t Start or Running Unstable?

    • If the sander won’t start or runs intermittently on the DC IN port, it’s because the battery needs some charge to operate properly in DC IN mode.
    • For stable performance, we recommend charging the battery to at least 2 bars via the rear Type-C port before switching to the DC IN port.
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    Customer Reviews

    Based on 7 reviews
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    M
    Marlena M. (US)
    4 in 1 Sander

    The sander and polisher is fantastic. Very easy to use and definitely does the job. I had saved projects to sand and polisher so I could test the machine. The size is on the smaller size, but the power is big! Battery lasts very long. I still haven’t charged it since I received the sander. Shipping was very fast.

    C
    Chandra G. (US)
    Sander

    It is awesome!

    T
    Tina Y. (US)
    Lets resin sander and polisher

    I love it and it's very easy to use and it works great