... 4.SDS-plugs Bit System 5.3 functions ASAKI Superior Electric Hammer(Model No.:AV224)Three Funtions:Rotation Only,Rotary Hammer ... System tool-free bit changes with automatic bit locking,dust protection and maximum inpact energy transfer rate6.Double insulated7.Supplied with ... ,1 pc depth stop,1 pc carrying case, drill bits Electric Hammer