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 94960 1/4" Composite-Style Coupler, 1/4" Female
Dynabrade 94993 1/4" Male Composite-Style Coupler with 1/4" Female Plug Assembly
Dynabrade 55034 3/8"-24 Female 5/8"-11 Male, 1-3/8" Length
Insize 3661-130, HIGH PRECISION NON-ROTATING SPINDLE ELECTRONIC MICROMETERS,100-130mm/3.94-5.12", 6940561933871
3M 26022, PPS Series 2.0 Adapter, Type S12, 10 mm Male, 1.0 mm Thread, 7100135943
3M 05050, Cloth Belt 384F, 80+ XF-weight, 3/4 in x 18 in, Fabri-lok, Full-flex, 7100141438, 200 per case 