Set of 7 pneumatic sanders, aluminum grinding pen, high rotation speed of 70,000 rpm with 1/4" thread size

Features: 1. High-speed pneumatic polishing pen made with premium materials and fine workmanship, featuring an aluminum alloy housing that is rust-resistant. 2. The nut and collet chuck are heat-treated, resulting in high hardness, strength, and excellent corrosion resistance. 3. Stainless steel rotor with a high speed of 70,000 RPM and 30mm long, wear-resistant blades for long durability and a long service life. 4. Comes with two different collet sizes, 2.38mm and 3mm, allowing you to change the collets according to different usage requirements. 5. 1/4-inch threaded air inlet port with a high-pressure resistant hose for stable and reliable performance. 6. This pneumatic air polishing pen offers the advantages of high efficiency, high precision, and low noise. It is widely used in machining, automotive repair, furniture making, and other fields. 7. Wide applications: it is suitable for metal polishing, wood carving, mold grinding, deburring, etc. Specifications: The pneumatic airbrush is a tool that uses pneumatic power and is commonly used for machining and dressing materials such as metal, wood, and plastics. It works by generating energy via compressed air to rotate the grinding bit, thus performing the workpiece processing. With the advantages of high efficiency, high precision, and low noise, the pneumatic air sander is widely used in machining, automotive repair, and furniture making. High-speed, wear-resistant 30mm blades offer long durability and a long service life. Supplied with two different collet sizes, 2.38mm and 3mm, you can change the collets according to different usage requirements. A 1/4-inch threaded air inlet port with a high-pressure resistant hose ensures stable and reliable performance. The pneumatic air polishing pen offers the advantages of high efficiency, high precision, low noise, and more. Repair, furniture making, and other fields. Wide applications; suitable for metal polishing, wood carving, mold grinding, deburring, etc. Specifications: Name: 7-piece pneumatic air grinding pen set Material: Aluminum alloy + stainless steel Rotation speed: 7000 RPM Number of bearings: 3 bearings Working air pressure: 6.3 kg/cm², 90 ib/in² Clamp size: 2.38 mm, 3 mm Pen diameter: 20 mm Pen length: 148 mm Air inlet thread: 1/4 inch Item size: 243 * 155 * 43 mm / 9.57 * 6.10 * 1.69 inches Item weight: 510 g / 1.12 lb Package size: 250 * 180 * 80 mm / 9.84 * 7.09 * 3.15 inches Package Weight: 515 g / 1.14 lb Packing List: 1 * Grinding Pen (with 2.38 mm collet) 1 * Silencer Tube 1 * 1.2 m Air Hose 2 * Wrench 1 * 3 mm Collet 1 * Fitting 1 * Empty Oil Pot