Y20 Pneumatic Rock Hammer Drill Introduction: * Model Y20 Hand-held Rock Drill is intended for drilling downward and inclined blast holes in medium hard and herd rock (f=8~18) * The rock drill is mainly used small quarries. Mines for constructing in mountain areas, water conservancy works in capital construction, also for secondary blasting in large mines and other projects, Model FY200B Line Oiler isincorporated into for lubricating during operation.