LEGO White Plate 1 x 2 with 1 Stud (with Groove and Bottom Stud Holder) (15573) ?

Markyd7

LEGO White Plate 1 x 2 with 1 Stud (with Groove and Bottom Stud Holder) (15573)

Is the stud holder the one with the small hole?

SuperBrick

No. Check the bottom on the 3d image:
http://rebrickable.com/parts/15573/Plate-Special-1-x-2-with-1-Stud-with-Groove-and-Inside-Stud-Holder-[aka-Jumper]

Markyd7

Thanks.

I'm guessing that small hole isn't classed as anything?

Graham

This is "stud holder" variant