The Rock Strength Index Apparatus is designed with an adjustable frame, allowing it to test rock samples with diameters up to 102 mm. This flexibility makes the device suitable for a broad range of sample sizes, accommodating both standard and irregularly shaped specimens.

The adjustable frame allows for precise alignment of test samples, contributing to accurate and reliable strength measurements. This feature is particularly beneficial for geotechnical engineers and researchers who work with diverse sample dimensions, enabling consistent testing of different rock types and sizes. The ability to handle specimens up to 102 mm in diameter greatly increases the functionality of the apparatus, making it a valuable tool for rock mechanics research.

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