With 23 Holes. Squareness: 0.0001". Parallelism: +/- 0.0001" Height Accuracy in Pair: +/- 0.0001". Hardness: HRC 56-60. Oversize to allow nominal tapping Finished from 6-16 micro inches. Nominal Tapping: 0.0001" to 0.0003". Surface finish 5 holes tapped to 3/8-16 and others untapped. Precision ground on all sides. Squareness on all sides Set includes: 5 socket head cap screws; 1 hex key. Packed in a fitted strong case Precision Engineering: Offers 0.0001" squareness and +/- 0.0001" parallelism for ultra-precise measurements. High-Quality Material: Hardened to HRC 56-60 for optimal durability and longevity, ensuring consistent performance. Superior Finish: Meticulously finished between 6-16 micro inches for a smooth surface, enhancing measurement accuracy. Versatile Design: Features 5 tapped holes (3/8-16) and remaining untapped, providing flexibility for various applications. Comprehensive Set: Includes 5 socket head cap screws and a hex key, all neatly packed in a durable, fitted plastic case.

• The Accusize Industrial Tools Ultra Precision 1-2-3 Blocks Set (Eg02-0408) is a pinnacle of measurement accuracy and reliability. Designed for professionals who demand the utmost precision, this set features 23 holes with exceptional squareness of 0.0001" and parallelism within +/- 0.0001". The blocks are hardened to a robust HRC 56-60, ensuring durability and resistance to wear over time. The surface finish, meticulously executed from 6-16 micro inches, provides a smooth and accurate base for all measurements.
• The set's versatility is evident in its design, offering 5 tapped holes at 3/8-16 and additional untapped holes, catering to a wide range of measurement tasks. Whether for machine set-up, layout, or inspection tasks, these blocks are an indispensable tool in any precision workshop.
• Accompanying the blocks are 5 socket head cap screws and a hex key, ensuring you have everything needed for immediate use. All these components are securely housed in a strong, fitted plastic case, providing both protection and organization.
• Optimized for both functionality and convenience, the Accusize Industrial Tools Ultra Precision 1-2-3 Blocks Set is an essential asset for achieving precise measurements in demanding environments.