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 52774 3/8" Reversible Drill, .5 HP, Rear Exhaust, 950 RPM
Insize 4120-10, METRIC THREAD RING GAGE, GO, M10x1.5, 6928640341458
Dynabrade 52772 3/8" Reversible Drill, .5 HP, Rear Exhaust, 450 RPM
Air Turbine Tools 201DM - 1/8" Straight Hand Tool Series with Brake, 65,000 RPM, 32166 