[on-off switch locking key]

Thanks wingless!  Good idea.  I will measure the opening and order it if it fits.

[on-off switch locking key]

Have an old Delta benchtop 8" drill press, Model 11-950, type 2.  Lost the locking key.  Went to ereplacementparts, and bought the suggested part, which doesn't fit.  What they sent is a key the fits into a single large slot it the middle of a switch.  My switch has two small slots, on upper and lower part of the switch.  I am presently getting by with two pieces of wood cut down from a popcicle stick jammed into the slots.  Are the type locking key I need universal, and if so, where can I buy one?