Model DHS680 is a 165mm (6-1/2 ) Cordless circular saw powered by 18V Li-ion battery. The DHS680 boasts a no load speed of 5000rpm compared to the DSS611 and DSS610 at around 3700rpm. Features of the Makita DHS680Z include: Automatic Speed Control: Automatically changes the cutting speed according to load condition for optimum operation. Electric brake. Soft start. Electronic current limiter for overload protection. Tool Hanger. Twin LED job light. Battery fuel gauge. Rear dust exhaust port. Large lock off lever. Compact and lightweight design. Ergonomic soft grip. Blower function to clear wood dust from cutting line. Larger base than current models for more stable operation. Includes a Makita B-09173 Specialized 165mm x 20mm 24 Teeth Cordless Circular Saw Blade These Makita premium "Specialized" saw blades are made especially for cordless saws and designed for greater efficiency when cutting wood. These blades are for wood cutting, with the most popular cordless circular saw models available - all with Makita's highest quality. 165mm Premium "Specialized" saw blades made especially for cordless saws Blades for wood cutting, with the most popular cordless circular saw models are now available - All with Makita quality! Specialized blades are precision manufactured for specific applications, machines and materials, such as embedded teeth blades powerfully cut through knots and wood with nails. Makitas New Lithium Ion Brushless BL Motors Makitas new Brushless Motors give up to twice the run time of a conventional motor with brushes and an upbeatable 22 minute charge with the DC18RC charger. Key Reasons why to go brushless - Brushless motor draws less amps, works twice as long - Less heat generation extends battery life, reduces frequency of charging batteries Makita s brushless motor enhances operational performance as well as battery longevity. This enables a Makita 3Ah battery to give users as much work a