The Makita DVR850RTE it's a 18V battery-powered concrete vibrator , ideal for concrete compaction in foundations, bases and reinforced concrete structures . Thanks to the 2.4 meter long flexible shaft and to the diameter of 25 mm , ensures effective removal of air pockets, improving the quality and strength of the concrete. Supplied complete with two BL1850 18V 5Ah batteries and a DC18RC rapid charger.