Features: Quick conversion head, easy to install and replace wall hole opener. Precise designs, can be suitable for different size of openers, improve work efficiency. Construction worker, family DIYer enthusiasts and other people who need to make holes in wall. Suitable for home decoration, building construction, office renovations and other scene that require wall opening. Enhances your toolkit with this conversion head tool, ensuring you achieve professional result everytimes. Specifications: Component:Metal Size:Approx.70.2mm/2.76inch Color:Silver Package Includes: 1pcs Wall Hole Opening Drill Bit note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual colorings of the item. Thanks for your understandings.