Options include iron type, backset, and separate thumbturn; see below to select.
Thumbturn is designed for standard privacy bolts using 1½" spindle and tail pieces, with a diamond width of 3/16".
Available in either smooth iron, with a flat black appearance reminiscent of Early American styling, or in rough iron similar to ironwork on old European castles and cathedrals, which has a natural-weathered look.