Features: brand new and high quality The dust cover is made of plastic, thas a hollow cavity to collect dust and debris as you drill each hole. We offer 2 kinds optional (125mm/160mm), you can choose one or more according to your needs. Bowl-shaped design, more convenient to use, larger capacity. Convenient and easy this attachment makes it to clean up after a project. Due to the versatility and practicality of this tool, it is an important addition to any toolbox. Suitable for engineering installation, air conditioning installation, wall drilling, etc. Specifications: Material: 160mm Size: Diameter: approx 15.5cm/6.10 inches Shank Diameter: approx less than 1cm/0.39 inches Shank Length: approx more than 2cm/0.79 inches 125mm Size: Diameter: approx 12.5cm/4.92 inches Shank Diameter: approx less than 1cm/0.39 inches Shank Length: approx more than 2cm/0.79 inches Type: 160mm/125mm Package Includes: 1x Dust Cover note: 1.Please allow 1-3cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.