Makita XTS01Z 18V LXT Lithium-Ion Cordless Impact Driver Kit Oil-Impulse Technology utilizes oil to hydraulically drive the impact mechanism for lower noise and increased efficiency Quick-Shift Mode selector has an automatic electronic controller that downshifts and reduces rotation and impact speed The BL Brushless Motor eliminates carbon brushes, enabling the BL Motor to run cooler and more efficiently for longer life;Maximum Torque (in.lbs.) : 355 in.lbs Efficient BL Brushless motor is electronically controlled to optimize battery energy use for up to 50% longer run time per charge The electronically-controlled BL Brushless Motor efficiently uses energy to match torque and RPM to the changing demands of the application Easy to use depth control setting by turning adjustment knob A convenient window on magazine shows the number of remaining staples Spring-loaded driving mechanism allows for a more compact tool with less weight Contact actuation is well-suited for production environment Rugged machined aluminum magazine ensures smooth loading and feeding of staples