---
title: 63 HRC, Rockwell Test Block w/ grid
url: https://shop.opti-tech.ca/product/63-hrc-rockwell-test-block-w-grid/
date: 2025-04-13T15:53:09+00:00
modified: 2025-12-30T19:40:16+00:00
lang: en_US
---

# 63 HRC, Rockwell Test Block w/ grid

Rockwell test blocks are used to verify the accuracy and calibration of Rockwell hardness testers across different Rockwell scales. These blocks are produced to strict industry specifications, offering a reliable reference for consistent and traceable hardness measurements. Each block is certified to ensure compliance with hardness testing standards in laboratory and production environments.