This dust collection adapter is designed for the Blum Ecodrill. It consists of two parts. The nut (1) screws onto the inside of the Blum EcoDrill on the largest part (2).
It does not disturb the drilling inside.

Dust port fits perfectly on a Festool 27 mm hose

PLEASE NOTE: *Installation requires you to drill a 40mm diameter hole into one of the sides of your Blum Ecodrill, this may void your warranty. Instructions for use are included with purchase.

EcoDrill not included.