RIDGID introduces the 18V OCTANE Brushless Cordless 7-1/4 in. Circular Saw Kit with 18V Lithium-Ion 4.0 Ah Battery (2-Pack). The OCTANE Brushless 18V 7-1/4 In. Circular Saw features a high performance brushless motor and advanced electronics that provide best-in-class power and intelligence. While providing increased performance with all RIDGID 18V batteries, OCTANE tools provide maximum performance in high demand applications when paired with OCTANE batteries (batteries not included). Paired with an OCTANE battery (batteries not included), this tool gives 30% more power. These 4.0 Ah batteries will provide up to 3X more runtime compared to the 1.5 Ah lithium-ion battery (AC870015). These 4.0 Ah batteries are 10% more compact and 10% lighter compared to the previous model (AC840087). With registration, this kit is backed by the Industry's Only Lifetime Service Agreement. The 18V OCTANE Brushless Cordless 7-1/4 in. Circular Saw includes a 7-1/4 in. blade, blade wrench, vacuum attachment, dust chute, rafter hook, two 4.0 Ah Lithium-Ion Batteries, and an operator's manual. Charger sold separately.