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

3M 19102, One Touch 1100 Earplugs Refill 391-1100, 2,000 Pair/Case, 7000128165
Dynabrade 94990 1/4" Female Composite-Style Coupler with 1/4" Male Plug Assembly
3M 27702, Cubitron II Roloc Durable Edge Disc 984F, 36+, YF-weight, TR, Maroon, 3 in, Die R300V, 7000045167, 200 per case
3M 27720, Cubitron II Roloc Durable Edge Disc 984F, 80+, YF-weight, TSM, Maroon, 1-1/2 in, Die RS150SM, 7000045177, 200 per case
3M 20940, PSA Cloth Disc 348D, P120 X-weight, 3/4 in x NH, Die 75K, 7000118912 