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 4120-16N, METRIC THREAD RING GAGE, NO GO, M16x2, 6928640341809
Dynabrade 94993 1/4" Male Composite-Style Coupler with 1/4" Female Plug Assembly
3M 26141, PPS Series 2.0 Adapter, Type S44, 3/8 Female, 19 Thread BSP, 7100158892
Dynabrade 95544 Gear Grease, 2.5oz. Tube
3M 84302, Cloth Belt 777F, 36 YF-weight, 3/4 in x 18 in, Fabri-lok, Single-flex, 7000118387, 200 per case 