Dear,
Shown in the picture is chinese one.
You simply visit any good tool hardware shop and how them picture. As a minimum, only go for STANLEY or HYUNDAI rotary Hammer Drill. If you got Stanley it more good as its Global brand.
Stanley main dealership lies in KHI, guy contact name and No is as follows
Mr.Zahid
0333 2272590
If you are pindi based, you can visit City Tools at Hathi Chowk or Stanley shop in Bao Mohalla just Adjacent to Aziz Tikka Shop. Thanks.
Further more, please go through this for drills Idea and information, your many questions will be address;
Rotary Hammer Guidelines