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HSChapter 84
U.S. imports of tool holders & self-opening dieheads for machines or hand tools (HS 846610) totaled $94.9M in July 2026, traded with 52 countries.
Importers of Tool Holders & Self-Opening Dieheads for Machines or Hand Tools paid $12.0M in duties in July 2026 — an effective duty rate of 14% on $86.4M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataPrecision tool-holding systems — including holders for forming and cutting dies (8466100110), replaceable cutting or drill insert holders (8466100130), and self-opening dieheads (8466100175) — are critical consumable accessories in metalworking, threading, and machining operations. Taiwan leads US imports under this heading, with Germany and Vietnam also significant sources; the supplier mix reflects both high-volume production capacity and precision-engineering specialization. Goods from China are subject to Section 301 tariffs, which has accelerated sourcing shifts toward Taiwan and Vietnam for many US machine-shop buyers. Correct classification between tool holders and work holders (heading 8466.20) is a frequent audit issue, as the distinction rests on whether the device grips the cutting tool or the workpiece.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
6.1K shipments/mo
A tool holder secures the cutting tool or die to the machine spindle or turret, while a work holder (8466.20) clamps or positions the workpiece being machined. Collet chucks, boring bars, and diehead assemblies belong under 8466.10; vises, chucks gripping the part, and fixtures holding the workpiece belong under 8466.20. Misclassification between these two subheadings is a common CBP audit finding.
Section 301 tariffs on Chinese-origin tool holders have prompted manufacturers and trading companies to shift production or transshipment to Vietnam, which is not subject to those measures. Importers should nonetheless verify origin documentation carefully, as CBP scrutinizes country-of-origin claims in this product category.
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 8466100175 | Tool Holders and Self-Opening Dieheads, NESOI | $72.1M | 12.78% | 89.41% | $9.2M |
| 8466100130 | Holders for Replaceable Cutting or Drill Inserts | $17.0M | 13.50% | 97.86% | $2.3M |
| 8466100110 | Tool Holders for Forming-Type or Cutting Type Dies | $5.8M | 8.32% | 90.23% | $482K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$94.9MYoY · Pro
Exports
$22.6MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Taiwan and Germany together supply 52% of it.
customs district
destination
entry
rate provision · imports
2.1% enters free of duty; the effective duty rate is 12.63%.