Clamp Lever Assembly.  Main shank has been counter-bored and loaded with spring and ball so that lever stays in selected position.  Fits Delta 46-430 Off-set Tool Reset Base and 12 Standard Duty Wood Lathes (Variable speed and 4-speed) following models:   46-221 46-222 46-223 46-224 46-541 46-542 46-543 46-544.