Solid Brass Material.
Fits 1/4" to 1/2" (6 to 12 mm) Thick Glass.
Back-to-Back Knob.
Use Monolithic Tempered Glass.
Overall diameter of knob is 1-9/16" (40 mm), overall height is 1" (25 mm) from glass.
Hole Diameter Required:
3/8" or 1/2" (10 or 12 mm)