---
publication_id: "OT-2026-000002057"
title: "Impact tool anvil with improved detent pin"
published_at: "2026-09-15T19:10:29.942630Z"
canonical_url: "https://opentechnical.org/p/OT-2026-000002057"
categories:
  - "tools-tooling/clamping-tools"
keywords:
  - "b25b21/02"
  - "b25b23/0035"
  - "b25b23/0035"
  - "b25b21/02"
  - "b25b21/02"
  - "b25b21/02"
---

# Impact tool anvil with improved detent pin

## Abstract

An impact tool includes a housing, an anvil extending from the housing, a tool element removably coupled to the anvil, a drive assembly to impart rotational impacts to the anvil, and a detent system supported by the anvil. The detent system includes a detent pin defining a longitudinal center axis and having a notch disposed on only one side of a longitudinal mid-plane containing the longitudinal center axis, and a retaining pin received within the notch. The detent pin is movable relative to the anvil between an extended position and a retracted position, the detent pin is configured to engage the tool element to retain the tool element on the anvil when the detent pin is in the extended position, the detent pin is biased toward the extended position, and the retaining pin engages an end of the notch to limit movement of the detent pin to the extended position.