1)Silence Air Grinder Die 2)have two bearing 3)fine quality Silence Air Grinder Die  Features:*lightweight aluminum housing*lever lock throttle for safety*built-in regulator*used with a variety of accessories for weld breaking,smoothing sharp edges,deburring,polishing and grinding*rear exhaust Specifications:*collect size~1/4"(4mm)*free speed~22000r/min*air inlet size~1/4"*working pressure~6-8kgs/cm2*air consumption~115L/min,4cfm 

7032B Fine Silence Air Grinder Die