Drilling a prepared hole as well as chamfering on steel, wood and aluminum.
・Design hex shank for quick change of impact drill.
・Using high-speed steel for Long life with reduced drilling resistance.
・Design X style thinning at the tip for great chip discharge at the drill tip and prolong battery life.
・Due to designed combining inner drill and chamfering cutter, be able to do for drilling pre hole and 90-degree chamfering in one process.
・Replacement inner drill offered and rechanged by an L-style wrench simply.