9902.15.81 - 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

This HTS category, 9902.15.81, specifically covers rotary drills, hammer drills, and chiseling tools that are powered by a self-contained electric motor, originally falling under HTS code 8467.21.00. The defining characteristics of tools within this provision are the presence of a pneumatic hammering mechanism designed to work with slotted drive drill bits, alongside an electromechanical system that decouples the drive from the internal gearing. Furthermore, these tools must meet stringent performance criteria: their rated amperage cannot exceed 15 amps, and their triaxial vibration levels, as measured by European Norm 60745, must be 9 m/s² or less.

Distinguishing this category from other potential classifications, particularly those within Chapter 84 covering machinery and mechanical appliances, lies in the combination of specific operational features and performance thresholds. While other powered tools might share some basic functions, this provision targets a niche set of high-performance, vibration-dampened electro-pneumatic tools designed for demanding professional use. The inclusion in Chapter 99 signifies a temporary legislative classification, often employed for goods subject to specific trade agreements, quotas, or other temporary import restrictions, differentiating it from permanent classifications based solely on product type and function. As a leaf node, this category does not have further subdivisions, meaning all tools meeting the precise technical specifications outlined are classified directly under this HTS code.