Mh505l, pneumatic jack hammer manufacturers air flushed, medium heavy duty rock drills is a top performer in its class, jack hammer drills, the mh505l is highly effective in general excavation work, quarry drilling, bench drilling, secondary drilling and other jobs requiring a sinker of its class. It is capable of drilling 27-40 mm diameter holes with h22 integral/extension steels up to depth of 6 meter. Features & benefits : Highly effective in general excavation work, quarry drilling, bench drilling, and secondary drilling Forged steel housings offer durability and withstand rugged use. Low weight High torque Very reliable and resistant to wear Large sliding face High impact energy Good penetration in hard and soft rock Dustless drilling Low spare parts consumption Blower for deep hole cleaning Robust kick-latch type retainers