marks security replacement door knobs

A quick learner from 19050 says:
March 23, 2019
the door knob has broken off also how do I remove the old one?
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Dave Sr. from SWISCO responded:
March 26, 2019

I'm not sure! It really depends on what you have, and I don't have a reference to go off of. I'm not familiar with the Marks brand. We do carry a generic handle set like the 40-119. This could be what you're looking for. These usually just screw on and unscrew off.
Mortise Lockset Heavy Duty Knob
Mortise Lockset Heavy Duty Knob
40-119
$109.13
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