GBS450(4.0S)
20V/450Nm
Small body, high torque
Small body 104 mm 
High torque 450 Nm 
Battery Durable Intelligent lithium-ion system

GBS450(6.0D)
20V/450Nm/6.0Ah 
Small body, high torque
New 6.0Ah large battery pack, big big difference! 
Small body 104mm 
High torque 450Nm 
Durable battery Intelligent lithium system