Mont Hard 6 inch Back to Back Tubular Pull in Polished Chrome Finish for Heavy Glass Frameless Shower Doors fits 1/4 inch to 1/2 inch thick glass doors with 6 inch center to center 1/2 inch diameter screwholes.This innovate, durable, product is, high quality and an exceptional value for your security and peace of mind. At Rockwell we build a wide spectrum of the finest exterior door locks, swing and sliding door hardware, door hardware, pocket door hardware, and hinges for both residential and commercial applications. We stand behind our products with our Rockwell Guard lifetime finish you will be guaranteed an extended life of magnificence and brilliance. We are based out of Northern California and have a state of the art ISO 9000 certified manufacturing facilities world wide.  includes; Mont Hard 6 inch Back to Back Tubular Pull in Polished Chrome Finish for Heavy Glass Frameless Shower Doors fits 1/4 inch to 1/2 inch thick glass doors with 6 inch center to center 1/2 inch diameter screwholes.