Solid cast iron thumb turn with heart shaped back plate for use with privacy mortise locks. The heart shaped backplate measures 1 13/16" tall by 1 11/16" wide and 1/8" in thickness. The spindle measures 3/16" by 1 3/8" and is oriented on the diamond. This thumb turn has a textured matte black finish.
Also called a turnkey, is usually an oval or crescent shaped knob which is turned to operate the dead bolt of a privacy or entry mortise lock and may be connected to a door plate or a separate part. Learn about hardware >