This brushless cordless 4-1/2 in. circular saw comes with 1 blade, rip fence, dust port adaptor and blade change key. The DCS571 features a bevel gear design allowing users to cut 2X material at 90 and 1X material at 45. With convenient on-board blade key storage users can change blades with minimal hassle. Elongated handle optimizes reach for rip cutting OSB and plywood. With the DCB205, you can cut up to 339 lin. ft. of 3/4 in. OSB. The DCB240 20-Volt MAX 4 Ah compact lithium-ion battery provides the highest capacity within the DEWALT 20-Volt MAX compact battery lineup. Using state-of-the-art lithium-ion technology, the DCB240 delivers up to 1/3rd more run time while maintaining the same size and weight as the DCB230 20-Volt MAX 3 Ah compact battery. Its small size and light weight provide ergonomic benefits for increased tool maneuverability and control for overhead applications. The DCB240 includes a fuel-Gauge LED charge indicator and 3-year limited warranty.