RTRMAX RTM226 ROTARY ELECTRIC CORDLESS HAMMER 3J SDS PLUS BAG 26MM 800W. Modified operation-mode change lever enables switch between'Rotation' and'Hammering' mode without rotating chuck. 3 mode operation: Rotation only / Rotation with hammering / Hammering only. One touch sliding chuck for easy bit installation and removal. Variable speed control by trigger.Drilling vibration into metal is 2.5 meter per second square.