Bosch Starter Kit GXS18V 15N15 18V CORE18V 4.0 Ah Battery GAL18V 40 4 Amp Charger (High Power 21700 Cells CoolPack 2.0 Cordless System Power) Hand Tools Substrate Guided Template Beveling: Tracing substrate Substrate Guided Template Beveling: Tracing substrate edges accurately using the integrated 1 2 inch pilot ball bearing to maintain consistent bevel width the BTD58S provides the durability and speed necessary to get the job done right the first time and chronic charging delays during intense metal fabrication and structural wood boring by matching the battery with a 4 Amp GAL18V 40 compact charger that reaches an 80% charge in just 48 minutes extending service life