Features: Attaches quickly and easily for added user convenience. Simple tool can help you have better when you are working with a hammer drill. Easy to install and clean, Electric hammer dustproof cover can effectively prevent dust and inhalation into the lungs. You not worry about damaging ceilings and wall materials when using this drillers dust bowl that collapses like a plunger when sealing. The best part is that not leave ceiling mark. Threaded occlusion, simple assembly and disassembly, and can be attach to wall. Specifications: Component:Rubber Size:125mm/160mm/180mm Package Includes: 1Pc Dust Bowl note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.