Check the listing for details. Hollow Core old style Brass Doorknob. 2-1/4" Plain Solid Sleek Design fancy new. Condition: New. Listed at 35.00 USD. Hollow Core Old-Style wrought solid brass door knobs.Your choice of four different finishes. (see our other designer knobs in our separate listings for better pictures of each finish)There are two hollow knob brass designs. Plain and an embossed line pattern. We have solid core heavy duty brass knobs in the same designs as well as an egg & dart design and a floral acanthus filigree pattern (See our separate listings)Overall Size:2.25 Inches in DiameterProjection is: about 2-1/8" (to the spindle)Base bottom diameter is: 5/8” Diameter - (Back of the knob where it inserts into the back plate).Steel spindle 4” long, 9/32” (7 mm) wide, with 3/8-20 threadWill fit doors with thickness in the range of 1″ to 2-1/2″.Sold as a set. Set includes 2 knobs on a spindle and an Allen key for set screwsFK-8746