HTS code 9902.15.81 covers "Rotary drill, hammer and chiseling tools with self-contained electric motor (provided for in 8467.21.00), each with pneumatic hammering mechanism that engages with slotted drive drill-bits and an electromechanical mechanism that separates the drive from the internal gearings, with rated amperage that does not exceed 15 A and with triaxial vibration values, measured in accordance with European Norm 60745, that do not exceed 9 m/s2" under the US Harmonized Tariff Schedule. This is the official duty rate charged by US Customs when this product is imported into the United States, sourced directly from the U.S. International Trade Commission and refreshed daily.