I don't think we do.Originally posted by al:
Why is a lamphloder called keyless?
KEY </font><font size="2" face="Verdana, Helvetica, sans-serif">
- <font size="2" face="Verdana, Helvetica, sans-serif">A lampholder with a flat or round "key" knob that operates an internal switching mechanism ("Keyless" lampholders do not provide an internal switching mechanism).</font>
My guess: Because the phrase was used long before drywall was invented, when walls were made of wood and plaster. You would use the tool for cutting holes in doors, so that the opening and locking mechanism could be installed.Originally posted by davedottcom: why do some people call a drywall saw a "key-hole saw"?