Built Tough Precision Hardened Steel Gauge Block Set 1 2 3 Inch Sizes Drop Dead Accurate Machinist Calibration Kit Featuring Cross Drilled Holes Screws Hex Key And Rugged Storage Case

Heavy Duty Precision Calibration Gauge Blocks for Workshop
✔️ 2 count hardened steel calibration blocks.0001 precision rating

Machine operators depend on these precision-ground tool steel reference blocks to lock in exact measurements during setup and inspection workflows. Fabricators mount them directly to mill tables and lathe chucks to establish unwavering measurement baselines across heavy machining environments.

✅ 1-inch through 3-inch block dimensions measure 25.4 mm to 76.2 mm overall
✅ Hardened tool steel body delivers.0001 inch verticality and.0003 inch dimensional tolerance
✅ Cross-drilled pattern reduces mass while maintaining structural rigidity
✅ Smooth spacer openings sized at 8.9 mm (0.35 inch) wide allow smaller bolt passages safely
✅ Threaded mounting threads accommodate standard 9.525 mm (0.375 inch) fasteners for secure stacking

💡 Why do machinists trust hardened steel reference blocks for shop floor measurements?

Picking up these handy calibration units keeps your setups right on target every single time.
- Hardened tool steel construction locks in tight tolerances for lasting repeatability
- Cross-hole designs let you pin multiple pieces together without extra weight
- Standardized inch sizing fits perfectly into digital readout calibration routines

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