BT 6321-7 1/4“ Pneumatic Air Powered Straight Die Grinder With 7" Extended Shaft. BT 6321-12 1/4“ Pneumatic Air Powered Straight Die Grinder 12" Extended Shaft. Berkling Tools Professional Grade Air Die Grinder series features 5 different type of tools:straight ,right angle ,115 degree and7" extended for various applications.
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