These RAZR Power Auger Drills are available in four sizes: 5", 6", 8" and 10". They can be easily paired with All RAZR Lithium and Gas Powerheads, or a 18v+ brushless drill with a 1/2" chuck. To operate any of these power auger drills with a 18v+ brushless drill, you also need to purchase the optional RAZR Ultra Drill Adapter. The following items are included with purchase: Drill Unit, Blade(s), Blade Guard, Collar Bolt, Allen key.