SIOUX 
R3S1-1702 BB
STYLE
VALVE SEAT GRINDER HOLDER - (3 Pieces)

Sound Less Rotation 

No Run out 

Tested @ High Speed RPM

11/16" X 16 TPI Stone Mount Thread

Pilot Bore Standard 0.385" 

EQUIPPED WITH C3 Series 
HIGH SPEED DUAL BALL BEARINGS


The Bearings Are Initially Crafted to resist the vibration during use and Special Treatments for Extra Long Life.