The CPK40-18 four-piece 18-volt Cordless Combo Kit features Bluecore batteries and a 30-minute dual-bay charger. It also has a cordless 18-volt Brute-Tough hammer drill/driver, 6½-inch circular saw, a reciprocating saw and flashlight. Registering the product is free and grants users two years of Bluecore battery replacements in the event of failure, one-year of tool replacement, and the following two years of tool repairs for free. A one-call resolution hotline is also available.