Bosch CLPK244-181-RT 18V Cordless Lithium-Ion 1/2 in. Hammer Drill and Impact Driver Combo Kit (Certified Refurbished) This Certified Refurbished product has been tested and certified to work and look like new, with minimal to no signs of wear, by a specialized third-party seller approved by Amazon. The product is backed by a minimum 90-day warranty, and may arrive in a generic brown or white box. Accessories may be generic and not directly from the manufacturer. 18V Cordless Lithium-Ion Compact Tough 1/2 in. Hammer Drill Driver - HDS181-RT. A 4-pole high performance motor provides maximum power in the most compact size New patented gear train and clutch delivers best in.-class compact design and lightest weight Electronic Cell Protection (ECP) increases battery lifetime by preventing misuse