Feature: 1. Long Lasting: Installation inner diameter of 41-45mm, suitable for most 100mm 4 inch 4.5 inch angle grinders. The cover is made of reinforced nylon (PA6) with a spring suspension design, it resists impact and abrasion. 2. Safety and Reliability: Specially designed for 100 115mm angle grinders, great fit, blocks debris and particles, prevents impurities from entering the machine, prolonging the service life. 3. Dustless Grinding: Using this 4 inch dust shround for grinding can reduce dust, improve work efficiency, and create a no dust grinding experience. This can ensure a cleaner, safer, and more productive work process. 4. Compatibility: The angle grinder dust shroud suitable for different surfaces, paint, marble, concrete, tiles, walls.The grinder dust shroud helps the user to stay away from harmful dust, and reduce the damage to the body. 5. Easy To Install: The dust cover collector does not need to be installed with the help of tools, you can used by self installation, small in size, light weight, and can be carried and operated without waste of labor. Specification: Item Type: 4 Inch Dust Shroud Material: PA6, ABS, Steel Weight: Approx. 820.00g / 28.92oz Outer Diameter: 138mm / 5.4in Inner Diameter: 122mm / 4.8in Inner Diameter Of The Middle Hole: 43mm / 1.7in Compatible with: 100-115 Angle Grinder Disc Diameter: 10cm / 3.9in Suitable for: Low Grinding Disc Sanding Paper, for Grinding Concrete Stone, etc.. Package List: 1 x 4 Inch Dust Shroud1 x Joint1 x Washer2 x Grinding Wheel