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 53533 Cone or Plug Grinder (Triple Extension)
Insize 2186-225E, DIAL SNAP GAGE, 8-9", 6928640358630
Air Turbine Tools 201SV - 3mm Straight Hand Tool Series with Brake, 90,000 RPM, 32173
Dynabrade 90874 2" Dia. Very Fine NWN DynaBrite Locking-Type Disc, 25/pack
3M 76622, Roloc Disc 777F, 36 YF-weight, TR, 1 in, Die R100N, 7000045618
Dynabrade 95544 Gear Grease, 2.5oz. Tube
3M 26140, PPS Series 2.0 Adapter, Type S45, 1/4 Female, 19 Thread BSP, 7100135336
Dynabrade 78424 4-1/2" Dia. x 3/8" Medium DynaBrite Surface Conditioning Disc, 25/pack
Dynabrade 78122 2" Dia. Medium NWN DynaBrite Locking-Type Disc, 25/pack
3M 80486, Cloth Belt 777F, 60 YF-weight, 3/4 in x 20-1/2 in, Fabri-lok, Full-flex, 7000118443, 200 per case 