About these items:Efficient Sanding: The sheet sander is powered by a 2.5A or 350W motor, delivering stable performance and a speed range from 6,000 to 12,000 OPM. This allows for versatile sanding from fine furniture finishes to large-area sanding tasks.Comfortable Operation: Features a rubber-coated, ergonomically designed handle that reduces hand fatigue and provides a comfortable grip, allowing for precise control, especially during extensive sanding tasks.Efficient Dust Removal System: Designed with a dust collection base and multi dust holes to capture dust generated during sanding. The detachable dust box ensures fresh air and minimizes dust spread, perfect for indoor use.Easy Sandpaper Replacement: The clamp-type sandpaper fixing mechanism allows for easy and tool-free sandpaper replacement, making it adaptable to a wide variety of sandpaper types, including cloth.Durable Build Quality: Constructed with a precision-machined aluminum sanding plate, the sander ensures uniform sanding and offers long-lasting durability compared to plastic base plates.Key Differences:Motor and Power:The first model (OS-005) has a 320W motor with 6,000-12,000 RPM adjustable speed.The second model (R7329) is equipped with a 350W brushless motor and 6 speed settings, delivering 4,000â10,000 RPM.Speed Range:The first model provides a wider speed range of 6,000â12,000 OPM.The second model offers a lower speed range of 4,000â10,000 RPM, with adjustable settings for more precise control.Dust Collection System:The first model (OS-005) has a detachable dust box for dust collection.The second model (R7329) features a vacuum adapter and hose to connect to a vacuum cleaner for more efficient dust removal.Sandpaper:The first model includes one piece of sandpaper (9.05 x 4.53 in / 230 x 115 mm).The second model includes 10 pieces of sandpaper (2 each of 80/120/180/220/320 grit).Product Weight and Dimensions:The first model (OS-005) weighs 4.85 lbs with dimensions of 340 x 113 x 175 mm.The second model (R7329) weighs 4.08 lbs with dimensions of 278 x 75 x 120 mm, making it more compact and lighter.Specifications:Item Model Number: OS-005Voltage Frequency: AC 220-240V 50HzRated Power: 320WSpeed: 6000-12000 RPMMain Material: PA6-GF30Product Dimensions: 340 x 113 x 175 mm / 13.39 x 4.45 x 6.89 inProduct Weight: 4.85 lbs / 2.20 kgItem Model Number: R7329Voltage Frequency: AC 110-120V 60HzRated Power: 350WAdjustable Speed: 6 SpeedsSpeed: 4000-10000 RPMMain Material: PA6-GF30Product Dimensions: 278 x 75 x 120 mm / 10.94 x 2.95 x 4.72 inProduct Weight: 4.08 lbs / 1.85 kgPackage Contents:1 x Sheet Sander1 x User Manual1 x Dust Collection Box1 x Sandpaper (9.05 x 4.53 x 0.04 in / 230 x 115 x 1 mm)1 x Sheet Sander1 x Vacuum Adapter1 x Vacuum Hose10 x Sandpaper (2 Each of 80/120/180/220/320 Grit)1 x User Manual1/2 Sheet 6000-12000RPM 320W