The Makita 18V X2 (36V) LXT Brushless 61/2 plunge Circular saw kit (XPS01PTJ) delivers precise and more accurate cutting when combined with an optional guide rail system (sold separately). the saw and rail system work together to produce accurate cuts with minimal tearout. The saw combines a powerful Makitabuilt Brushless motor powered by two 18V LXT batteries with automatic speed Change technology, which adjusts cutting speed and torque during the cut for optimum performance. The saw has a variable speed control dial (2, 500 6, 300 RPM), with soft start and an Electric brake for added convenience. It has a large 23/16 cutting capacity at 90 degrees, with a bevel capability of 1 to 48 and positive stops at 22.5 and 45. when used with a rail system (sold separately) the plunge Circular saw is a more portable option to a Table saw for select applications, and is ideal for use on the job site or in a workshop. The kit includes two 18V LXT 5.0Ah batteries, and each reach a full charge in only 45 minutes on the efficient Rapid optimum charger the fastest chargetime in the Category for less downtime and increased productivity. For added convenience, the batteries feature an integrated L.E.D. Battery charge level indicator. Its part of Makitas expanding 18V LithiumIon system, the worlds largest cordless tool system powered by 18V LithiumIon slidestyle batteries. Makita 18V LithiumIon batteries have the fastest charge times in their categories, so they spend more time working and less time sitting on the charger. For improved tool performance and extended battery life, Makita created Star protection Computer controls . Star protection is communication technology that allows the Star Protectionequipped tool and battery to exchange data in real time and monitor conditions during use to protect against overloading, overdischarging and overheating. For increased versatility, the tool can also be powered by Makita 18V LXT and compact LithiumIon batteries with the Star symbol on the battery indicating Star protection inside.