Tools required
The following tools are required for installation:

Power drill.
Hole cutter of an appropriate size for the 8.00 mm (0.31 in) surface and flush mount corner diameter cutout line, or the 90.94 mm (3.58 in) retrofit / offset mount center diameter cutout line.
Jigsaw.
Half round file (or sandpaper).
* Hand router with a router bit of an appropriate size for the 11.50 mm (0.45 in) corner diameter, required for the flush mount rebate.
Marine grade sealant.
Drill bit.
Masking / self adhesive tape.
Note
* Items are only required when flush mounting the display.