This Bosch Twin Pack includes the new 2.0ah 12v batteries with 2 of the most popular machines in the 12.8v Bosch Range. This includes the 2 speed combi hammer drill and the impact driver complete in an Bosch Bag The GSB 12V-15 + GDR 12V-105 Twin pack, optimum convenience for everyday drilling/driving needs. Electronic Cell protection (ECP) technology which gives the tools a longer life and run time by protecting the batteries against overload, overheating and deep discharge. Both tools also offer the convenience of being extremely compact to handle those inconvenient jobs in tight spaces with optimum control. GSB 12v-15 LI Features: At 189 mm it has the shortest design in its class for optimum handling, especially when performing drilling and screwdriving applications overhead and.