When working with a hammer drill, it can effectively reduce the dust concentration and protect your health from dust. This product is easy to install, just install the dust collector on the drill bit to use, unscrew the cover to empty the dust. The electric hammer dust cover is easy to use, turn to the left to unscrew can pour out dust, and tum to the right to tighten the lid. The product is made of ABS material, very durable, suitable for 4-10 mm drill bits, suitable for any brand of drill bits. It can be used for all kinds of projects that require drilling, such as engineering installation, air conditioning installation, wall drilling, etc.