Bosch CLPK401181RT 18V Cordless Lithium-Ion 4-Tool 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 Brute Tough 1/2 in. Hammer Drill Driver - HDH181-RT. 4-pole high performance motor - For maximum power in the most compact size New patented gear train and clutch - Enables OST compact design in its class and lightest weight Flexible power system - Both DD and HDD are compatible with every 18V Lithium-Ion Bosch battery