RYOBI® 18V ONE+™ introduces lithium-ion performance at Ni-Cd prices. This kit is powered by new lithium-ion batteries, the very best value in lithium-ion performance. They hold a charge 4X longer, offer up to 20% more runtime and are 45% lighter weight than Ni-Cd batteries. Batteries stored on the IntelliPort™ charger are conditioned for peak performance. The drill includes a 1/2 inch heavy-duty single sleeve, keyless chuck with 24 position clutch to match your drilling and driving needs. The circular saw has a 5-1/2 inch, carbide tipped blade to rip through 2-by material and sheet goods.