The Makita 12V max CXT Cordless 1/2” Impact Wrench, Tool Only (WT03Z) delivers power and speed in a compact size for efficient fastening. It is an ideal solution for working in tight spaces and overhead applications. With Makita 12V max CXT Lithium-Ion slide-style batteries (sold separately), users get superior balance and ergonomics over pod-style batteries. For longer run time, 12V max CXT cordless tools are also compatible with the 12V max CXT Lithium-Ion 4. 0Ah battery (BL1041B). 12V max CXT Lithium-Ion batteries are engineered with a Battery Protection Circuit that protects against overloading, over-discharging and over-heating. It’s part of the expanding 12V max CXT series, combining performance with superior ergonomics in a compact size. Makita’s entire line-up of impact drivers and impact wrenches including the WT03Z is engineered with a proprietary hammer and anvil impact mechanism that is manufactured using the best raw materials with the highest quality steel, as well as a unique heat-hardening process for maximum fastening and driving power.