Spindle separates into two pieces/broken- old handleset spindles, and early pop-up privacy spindles, have been known to come-apart. SOLUTION: new spindle of the latest design
KNOBS WILL NOT SCREW ON COMPLETELY
PROBABLE CAUSES:
1) Door too thin, or spindle too long. SOLUTION: determine door thickness and spindle length. Send correct spindle.
2) Knob not threaded fully at factory. SOLUTION: determine if the issue is the knob, or spindle, by trying another knob on the spindle. Then, trying a different spindle on a knob that would not thread fully.