This brushless circular saw is designed to provide users with powerful and easy cutting for a variety of plumbing, electrical, framing, finishing and carpentry work. The saw is powered by a state-of-the-art "brushless" motor with 3650 rpm allowing users to cut hard material quickly and easily. This new type of motor has a longer life, is more powerful and has less power consumption than conventional carbon brush motors. Top and bottom the metal protective cover provides excellent blade protection in the event of dropping the tool. The soft rubber handle is ergonomically designed to provide users with excellent comfort and balance for easy-to-use cutting. For normal work, one or two 2000mAh batteries are sufficient, which you can quickly charge in the quick charger supplied, or for more demanding work we recommend larger batteries with a capacity of 4000mAh.The batteries can be interchanged in all the tools from the EXTOL SHARE20V series. Thanks to the Li-ion technology the batteries can be recharged at any time without reducing their capacity. Li-ion batteries lose minimal energy due to self-discharge and last a long time when charged ready to use.