The Bosch CLPK221-181 - 18V 2-Tool Kit is a DIY professional�s dream come true. This set features an HDH181 - Hammer Drill/Driver and a 25618 - Impact Driver. It also comes with 2 FatPack HC Batteries that takes a lot of time before power runs out after extended use. The Hammer Drill/ Driver requires 18 volts of electricity for efficient and continued use, and runs on lithium ion batteries. It is also cordless, which means that you can simply take it around the house and still manage to use it to full effect. Upon purchasing the package, one can also expect a handy charger as well as a carrying bag for added portability. This product by Bosch is simply one of the handiest tool kits that anyone can ever get their hands on, and will simply make for a good DIY investment in the long run.