Makita is the innovation leader in brushless motor technology, and the XT617T Combo Kit provides tools with brushless motors that deliver longer run time, increased power and speed, and longer tool life. This 6-Piece Combo Kit is built for users who require a wide range of cordless solutions for drilling, driving, fastening, cutting, and grinding.The XT617 includes a Hammer Drill with 1,250 in.lbs. of Max Torque, a 4-Speed Impact Driver delivering delivers 3,600 Max RPM and 1,590 in.lbs. of Max Torque, a Recipro Saw delivering up to 3,000 strokes per minute, a 6-1/2 Circular Saw with a no-load speed of 5,000 RPMs and a max cutting capacity of 2-1/4" (at 90°), a 4-1/2" / 5" Cut-Off/Angle Grinder with a no-load speed of 8,500 RPMs, a L.E.D. Light that can light up almost any workspace, as well as two 5.0Ah batteries, a rapid charger, and a tool bag to carry it all in.For improved tool performance and extended battery life, Makita created Star Protection Computer Controls. Star Protection is a communication technology that allows the Star Protection-equipped tool and battery to exchange data in real time and monitor conditions during use to protect against overloading, over-discharging and overheating. For increased versatility, the tool can also be powered by Makita 18V LXT Lithium-Ion Batteries with the star symbol on the battery indicating Star Protection inside.