1. The front and back can be installed with plates or punched. There is no need to open holes in the back plate in advance and then install the plates before opening holes for installation. 2, aluminum alloy material CNC finishing, light and , long-term use is not easy to damage 3. Wide range of applications, multi-scenario application, easy to solve a variety of installation problems scope of application:Type 86 switch The actual product may have slight color difference or difference, which not affect the use Colour:Black Material:Aluminum Alloy type:A: Three holes Package Contents: 1 x Switch Socket Opening Template Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.