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Quality & Professional / Popular earth auger bits for Hand held earth auger machine 1. Cast steel earth auger bits tip with Removable & replaceable Ally blade and saw teeth blade . 2. Hexagon bolt / Spring D type Nut 4. Single helical / Double helical 3. Dia size from 1.2''/1.8''/2.4''/3''/3.6''/4.5''/6''/7.5''/9''