High-precision parallel gauge blocks: Designed for accurate measurement, positioning, and clamping in machining. Made of hardened steel: High surface hardness resists wear and corrosion for long-term industrial use. Excellent dimensional consistency: Tight tolerances ensure reliable performance on lathes and milling machines. Versatile measuring tool: Ideal for inspection, setup, shimming, and parallel alignment tasks. Perfect for machining and quality control: Widely used in mold making, metalworking, and metrology labs.