By the same token, a 4.5x3 mm mill abutment is placed at #2.  A 4x15 mm drill is at #3.  Note the thick gingiva (>10 mm).  The implant at #2 is placed supracrestal. because of the thick gingiva.

Mill Abutments

Xin Wei, DDS, PhD, MS 1st edition 08/11/2017, last revision 08/11/2017