[effective dust protection] - when the bit in the great wall, using this kind of bit can effectively prevent the spread of dust, so that the dust is concentrated in the dust catcher, to prevent the eyes, head, neck and other parts are glued. Dust covers prevent dust from falling on clothes or the floor and inhaling it into the lungs. [foldable design] - the dusting platform is flexible and foldable, compact and easy to carry. It is a practical accessory for electric drilling rig. The drill dust collector has large capacity and light weight without increasing drill weight and long service life. [easy to use and clean] - rubber dust collector can be installed in a minute. It is also very convenient to use. It does not require tools such as vacuum cleaner, broom and shovel and can be used with both hands. The drill dust cover is very easy to install and clean. [2 sets dust cover] -1 set includes 1 black and 1 white, and 8 rubber mats, it there are two sets. For electric hammers, electric picks, drills, etc. Can be used for technical installations, wall drilling, etc. The inner hole of the rubber mat is very small and can be installed on the bit very firmly. It is not easy to fall. Ideal for families and professionals. Dimensions: top gauge 12mm, length 115mm, inner diameter 5mm, outer diameter 17mm