CRL Cylinder Style Brushed Nickel Finish Back-to-Back Shower Door Knob

Requires a 3/8" to 1/2" (10 to 12 mm) Hole, Use Monolithic Tempered Glass, Back-to-Back Knob Without Protective Plastic Sleeve, Fits 1/4" to 1/2" (6 to 12 mm) Thick Glass, Solid Brass Material