ZRH-134NP 4X Shock Reduced Air Riveting Hammer-Low Vibration Features Designed with following patents for assuring the best shock reduction and operator’s comfort. 1) Portable pneumatic tool assembled with module units. 2) Suspension vibration-reducing means for portable pneumatic tools. Alloy steel made impact parts, heat-treated for durability. Spool valve allows slow heavy blows needed to drive [...]