The shank is electrically conducted to the metal workpiece through the chuck and table,
the LED lights up and the beeper sounds(only for 6566-3E),
when the ball touches the workpiece
Not suitable for rotary use. Hardened shank and contact ball
Hardened shank and contact ball

Dynabrade 96245 Repair Collar-.992" Bore
Insize 2307-1R, REVERSE READING DIAL INDICATOR, 1", lug back, 6928640396649
3M 28416, Disc Pad Hub And Retainer Nut, 2-1/2 in x M14-2 Internal, 7000119302
3M 45179, Roloc Disc Pad TR, Medium 4 in 1/4-20 Internal, 7000045281 