Designed for machinists, woodworkers, metalworkers, and related trades who need a reliable reference for setup and measurement tasks. Size: each block measures 3 inches by 2 inches by 1 inch, providing a compact, easy to handle reference for a range of workspaces. Function and benefits: Calibrate equipment with a known reference dimension to verify accuracy and repeatability. Space workpieces consistently in fixtures or jigs to maintain uniform gaps and alignment. Collect and record exact dimensions for comparison across parts or QA checks. Compatibility and use workflow: Suitable for standard measurement practices and common tooling setups. Works with typical calipers, micrometers, height gauges, and layout processes where a fixed reference is needed. Practical use scenarios: Scenario 1: Use the block to verify the zero or reference point on a micrometer, ensuring measurement accuracy across a batch. Scenario 2: Place the block in a jig to align multiple workpieces at a fixed spacing, improving consistency in repetitive assemblies. Scenario 3: Record dimensions from a sample part and compare against nominal tolerances to support quality assurance procedures. Reliability and performance: Provides a stable, repeatable reference size to support precise setup, layout, and measurement workflows across diverse workshops.