Bosch 12V 2x3Ah BL Drill Driver Grinder Twin Kit 0615990N2Z The Bosch 0615990N2Z 12V 2x3Ah BL Drill Driver Grinder Twin Kit. Ideal for professional fabricators and mechanics engaged in metal working. It contains two cordless power tools that will allow you to tackle a range of tasks. First is the GSR 12V-35 FC 12V Drill Driver that can tackle drilling tasks in both wood and steel. In wood it can achieve a maximum drilling diameter of 32mm and in steel of 10mm. Switching attachments is made extremely easy thanks to Bosch's unique FlexiClick system. To ensure premium performance and a longer tool life Bosch have equipped this drill with a brushless motor which also prevents overload even during demanding applications. The second tool is the GWS 12V-76 12V Angle .