A Vacuüm connector for the Htachi (or HiKOKI) M12V router. This 3th version fits snug and works great without limiting any use of the router or it's rage. It has a large opening to still see your router bit in action. I printed it twice, 1st one came out great only small distortions in the overhanging fases, the second had large distortion in these area's so you migh want to play with the printing file. But functinaly it works great.