Blumat 8mm THROUGH-HULL TANK CONNECTOR BULKHEAD for Reservoir/Rain Barrel and Watering Systems

this works with 1/4in tubing right?

Can I use this for drilling a hole in a 5 gallon bucket to make my own water reservoir, or do i need another connector to attach to this on the bucket

Does it come with 1 or 2 adapters?

What size drill bit should be used?