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

Insize 4112-CD143, INDIVIDUAL STEEL GAGE BLOCK, .143", grade AS-2, 6928640353093
Dynabrade 95842 Dynabrade Air Lube 10W/NR, 1 Pint
Dynabrade 51756 .1 hp Straight-Line Extension Pencil Grinder, Rear Exhaust, 35,000 RPM, 1/8" Collet 