Applicable to: Bimetal hole saws, glass hole saws, etc., for hole saws with a shank diameter of not more than 10mm/0.39in and a shank length of not more than 20mm/0.79in. Moderate size, suitable for 16mm/0.63inch-125mm/4.92 hole opener. Simple and quick operation: connect quickly and easily to increase the convenience of use . When working with an impact drill, simple tools can help you achieve better results. Easy to install and clean: silicone. Easy to install and clean, installation only takes a minute. The dust cover of the electric hammer can effectively prevent dust from spreading and inhaling into the lungs. No ceiling marks: When you use this drilling dust bucket, you don't have to Worry about damaging the ceiling or wall materials, the dust bucket will collapse like a piston when sealed to the surface. The best part is that it does not leave marks on the ceiling. Stability: threaded bite, built-in bearing, simple assembly and disassembly, can be fixed on the wall. Protect your health from dust. Note: The data is all manually measured, please allow 1-3cm error due to differences in light and display, there may be differences in color, please refer to the actual item received.