Furniture lifters for heavy furniture are made of metal. Device sliders are strong enough to hold up to 880 lbs risk-free The furniture mover provides leverage to lift your unit to slide the four rollers under each corner, you can now easily roll your unit. Once you're done, use the furniture lifter again for heavy furniture to remove the rollers. This furniture slider for tile floor is fine workmanship and precise size, appliance jack lifting and mobile equipment is compact in size, easy to store, save space, easy to carry tools, work quickly and efficiently with heavy duty furniture sliders. Suitable for any type of floor. Use the wheels for hardwood, tile, concrete, linoleum or other hard surfaces and adapter pad for carpet, rugs or other loose or soft surfaces, Manufacturer: CTRLZS