---
product_id: 652680862
title: "Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit"
brand: "taytools"
price: "$U1221"
currency: UYU
in_stock: false
reviews_count: 5
url: https://www.desertcart.uy/products/652680862-taytools-pair-hardened-steel-123-blocks-and-attachment-hardware-kit
store_origin: UY
region: Uruguay
---

# Precision ground ±0.0001" flatness & parallelism Flush, hidden hardware attachment system Hardened tool steel RC 56-60 Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit

**Brand:** taytools
**Price:** $U1221
**Availability:** ❌ Out of Stock

## Summary

> 🔧 Elevate your precision game—because every micron counts!

## Quick Answers

- **What is this?** Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit by taytools
- **How much does it cost?** $U1221 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.uy](https://www.desertcart.uy/products/652680862-taytools-pair-hardened-steel-123-blocks-and-attachment-hardware-kit)

## Best For

- taytools enthusiasts

## Why This Product

- Trusted taytools brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Organized:** Comes in a sleek telescoping storage tube to keep your precision tools protected and ready to go.
- • **Rock-Solid Durability:** Crafted from hardened tool steel (RC 56-60) built to last through any shop challenge.
- • **Versatile Shop Essential:** Ideal for machine setup, layout, inspection, woodworking, and DIY projects—your all-in-one precision partner.
- • **Seamless Modular Assembly:** Innovative hardware kit lets you join blocks flush with no exposed bolts—perfect for custom setups.
- • **Unmatched Precision Engineering:** Ground on all six sides to ±0.0001" for flawless squareness and flatness.

## Overview

The Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit delivers industrial-grade precision with hardened tool steel blocks ground to ±0.0001" flatness and squareness. Featuring 23-hole blocks and a patent-pending hardware kit, it enables seamless, flush assembly without exposed fasteners, making it indispensable for machine setup, inspection, and advanced DIY projects. Packaged in a compact storage tube, this set is engineered for professionals demanding unmatched accuracy and modular versatility.

## Description

123 blocks coupled with our attachment hardware kit have an almost endless array of uses in the shop. They can be used for machine set up, layout and inspection. Specifications: 1-2-3 Block Set: 23 Hole: Made of hardened tool steel (RC 56-60) Precision ground on all six sides. Overall size within +/- 0.0001" (one ten thousandth of an inch) Flatness and parallelism within +/- 0.0001" (one ten thousandth of an inch) Squareness on all sides to within +/- 0.0003" per inch (three ten thousandths of an inch) Pairs are matched to a tolerance of 0.0002" (two ten thousandths of an inch) Two (2) pieces per set 23 each .340" through holes (5 holes tapped with 3/8" x 16 TPI threads and 18 holes are untapped). Note: these blocks cannot be bolted together without exposed hardware. In order to attach multiple blocks together with no exposed hardware you will require the Taytools 123 Block Hardware Attachment Kit. Approximate weight per block: 430 grams/.95 pounds 123 Block Hardware Attachnent Kit 123 Blocks are a common accessory found in nearly every machine shop machine shop and are useful for numerous work support, set up and inspection tasks. 123 Blocks are even becoming more coming on woodworking and DIY shops. What makes 123 block so useful is they’re made from hardened steel and precisely ground (within 0.0002”) to 1” x 2” x 3” with all sides being square to each other. Many inexpensive 123 Blocks contain numerous holes allowing them to be bolted together to increase their usefulness. Several problems arise when attempting to join several blocks together: 1) the holes in the sides and faces are not the same distance from the edge and when different faces are bolted together these are steps or offsets, and 2) using readily available bolts and nuts will leave hardware proud of the block’s surface interfering with the task at hand. This 123 Block Attachment Hardware Kits addresses the above bolting limitations. This hardware allows joining blocks together with all hardware buried within the blocks. The hardware is also slightly smaller than the holes allowing edges and faces to be joined together with faces being flush with each other. This hardware kits contains the following parts: two each 7/8” long by 5/16” diameter 8-32 threaded dowels, two each 7/8” long by 5/16” diameter through hole dowels that fit 8-32 bolts, two each of the following length 8-32 Allen Head Cap Screws 1-1/2”, 2” and 2-1/2”, 9/64” hex key and a small flat screwdriver tip. To use, insert a through hole dowel into a block hole and thread a screw through the hole. Next insert a threaded dowel into a hole in another block and screw and tighten the screw t into this nut to secure two blocks together. Each dowel has a straight screwdriver slot in line with the hole to assist in getting the dowels perfectly lined up to accept the bolts. The included screwdriver tip can be inserted in the slot to help in getting the dowels lined up to accept screws. Using this hardware allows two blocks to be attached to each other in literally every possible configuration. Comes in telescoping plastic storage tube. Patent pending.

Review: Excellent quality blocks, including fasteners so you can use these for longer right angles as well as straight measures.
Review: ok, have not actually used this other than unwrapping and cleaning it but does measure square. It came well wrapped and covered in oil so that had to be cleaned. Machining looks good, no case but good deal for the price. Will be used for making model structures where I need square walls. I think it will be fine for that, good tool to have in your kit.

## Features

- 123 blocks coupled with our attachment hardware kit have an almost endless array of uses in the shop. They can be used for machine set up, layout and inspection.
- 1-2-3 23 Hole Blocks are made of hardened tool steel (RC 56-60) and precision ground on all six sides. Overall size within +/- 0.0001" (one ten thousandth of an inch) Flatness and parallelism within +/- 0.0001" (one ten thousandth of an inch) Squareness on all sides to within +/- 0.0003" per inch (three ten thousandths of an inch) Pairs are matched to a tolerance of 0.0002" (two ten thousandths of an inch). Two (2) pieces per set .
- Blocks have 23 each .340" through holes (5 holes tapped with 3/8" x 16 TPI threads and 18 holes are untapped). Note: these blocks cannot be bolted together without exposed hardware. In order to attach multiple blocks together with no exposed hardware you will require the Taytools 123 Block Hardware Attachment Kit. Approximate weight per block: 430 grams/.95 pounds.
- 123 Block Hardware Attachnent Kit allows joining blocks together with all hardware buried within the blocks. The hardware is also slightly smaller than the holes allowing edges and faces to be joined together with faces being flush with each other.
- This hardware kit contains the following parts: two each 7/8” long by 5/16” diameter 8-32 threaded dowels, two each 7/8” long by 5/16” diameter through hole dowels that fit 8-32 bolts, two each of the following length 8-32 Allen Head Cap Screws 1-1/2”, 2” and 2-1/2”, 9/64” hex key and a small flat screwdriver tip.
- Using this hardware allows two blocks to be attached to each other in literally every possible configuration. Comes in telescoping plastic storage tube. Patent pending.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0C4W1XZWB |
| Customer Reviews | 4.5 4.5 out of 5 stars (86) |
| Date First Available | 30 July 2024 |
| Item Weight | 989 g |
| Manufacturer reference | 107591 |
| Product Dimensions | 5.08 x 10.16 x 15.24 cm; 989 g |

## Images

![Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit - Image 1](https://m.media-amazon.com/images/I/31Jx2YHCjYL.jpg)
![Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit - Image 2](https://m.media-amazon.com/images/I/31jauKcYwaL.jpg)
![Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit - Image 3](https://m.media-amazon.com/images/I/61JNpNa8wgL.jpg)
![Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit - Image 4](https://m.media-amazon.com/images/I/71CptXwPnwL.jpg)
![Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit - Image 5](https://m.media-amazon.com/images/I/71Hsym6vAeL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by S***N on 4 August 2025*

Excellent quality blocks, including fasteners so you can use these for longer right angles as well as straight measures.

### ⭐⭐⭐⭐⭐ Review
*by R***W on 19 February 2025*

ok, have not actually used this other than unwrapping and cleaning it but does measure square. It came well wrapped and covered in oil so that had to be cleaned. Machining looks good, no case but good deal for the price. Will be used for making model structures where I need square walls. I think it will be fine for that, good tool to have in your kit.

### ⭐⭐⭐⭐⭐ Review
*by T***E on 8 November 2025*

These are very nicely made and are even handier with the joining hardware. I highly recommend this product.

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- Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit
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*Product available on Desertcart Uruguay*
*Store origin: UY*
*Last updated: 2026-02-23*