18V 520nm 1/2" Electric Cordless Impact Wrench Brushless Driver Torque Tool. Powerful : 520NM high torque, 3000rmp steeples speed change switch.Powerful electric wrench, multi-purpose, super power. Compatible with:For Makita 18V lithium-ion batteries such as Makita BL1830, BL1830B, BL1840, BL1840B, BL1850, BL1850B, BL1860B etc.(Battery not included).