Ultra Precision One Two Three Blocks Set With Screw In Plastic Box By Accusize Industrial Tools 23 Hole Block Kit With 0.0001 Inch Squareness And Parallelism Height Accuracy 0.0001 Inch Finish From Six To Sixteen Five Holes Tapped

Ultra-Precision 23-Hole Block Set with Tight Squareness
✔️ 0.0001 in squareness, ±0.0001 in parallelism, height 0.0001 in

This precision block set delivers ultra-clean reference surfaces ideal for square checks and precise fixturing in mills, lathes, and inspection benches. Use it to verify setup accuracy, measure squareness, and support reliable manufacturing workflows.

✅ 23-hole block set with 5 tapped holes (3/8-16) and remaining untapped
✅ Squareness 0.0001 in and parallelism ±0.0001 in
✅ Height accuracy ±0.0001 in per pair
✅ Hardness HRC 56-60 for durable service
✅ Surface finish 6-16 microinches; precision ground on all sides
✅ Includes 5 socket head cap screws and 1 hex key in a fitted plastic case

💡 What is a precision block set used for in machining and inspection? This handy tool helps keep setups true and checks accurate for factory floors and workshops.
- Handy for establishing square references in milling, drilling, or inspection tasks
- Useful for verifying fixture alignment and tool heights with tight tolerances
- Great for confirming height and squareness during quality checks