2pcs Hardened Steel 1-2-3" Blocks 0.0001" Precision Matched Machinist 123 Milling Tool 23 Holes 25-50-75mm block gauge

This high-precision 1-2-3 block set includes two hardened steel blocks in standard sizes of 25mm, 50mm, and 75mm, designed for accurate measuring and alignment in machining and metalworking applications. Each block features 23 precision-drilled holes for versatile use with clamps, fixtures, and tool holders. With a tolerance of 0.0001 inches, these gauge blocks are ideal for professional machinists, engineers, and hobbyists who require exact measurements and reliable performance. The blocks are heat-treated for durability and resistance to wear, ensuring long-lasting accuracy even under heavy use. Perfect for milling, drilling, grinding, and inspection tasks, this set is an essential addition to any workshop or industrial setting.