Classic Crystal Knob Door Set The Coleman was used on many Craftsman and Colonial Revival interiors from 1900 well into the '30s. Though techniques for pressing molten glass into molds had been around since the 1820s, glass knobs didn't really become popular until after 1917, when the metals that had been used for doorknobs went instead to the war effort. Now the Coleman's sparkly octagonal knob adds vintage charm to houses old and new. Coordinating doorsets and finishes unify the look of a home. But a door set's ability to open smoothly, lock snugly, and keep working are details as important, if not more, than how it looks. We make them like they used to — to last —with crisply detailed forged brass backplates and doorknobs in porcelain, crystal, and solid brass. Solid brass Choose different finishes on each side, or the same finish on both sides Standard 2-3/8" backset Latch sets include 3-1/2" spindle for 1-3/8" thick doors Assembled in the USA of imported and domestic parts Need a hand? Click here for more information on how to pick an Interior Doorset.