Hole Drilling Required

5/8" (16 mm) or 3/4" (19 mm) diameter
Towel Bar, Knob, and Top Hangers Require Holes in Glass
Two 3/4" Holes
Yes, Two 1/2 Inch Holes
Yes, Two 3/4" holes
Yes, Two holes in glass per panel, no cut-out
Yes, two holes per attachment are required, with no cut-out necessary