---
product_id: 532766325
title: "Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit"
brand: "taytools"
price: "A$25"
currency: AUD
in_stock: false
reviews_count: 8
url: https://www.desertcart.com.au/products/532766325-taytools-pair-hardened-steel-123-blocks-and-attachment-hardware-kit
store_origin: AU
region: Australia
---

# Tight Tolerances Precision Ground Hardened Steel Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit

**Brand:** taytools
**Price:** A$25
**Availability:** ❌ Out of Stock

## Summary

> 🔧 Elevate Your Workshop Game with Precision Engineering!

## Quick Answers

- **What is this?** Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit by taytools
- **How much does it cost?** A$25 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/532766325-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

- • **Durable Design:** Crafted from hardened tool steel (RC 56-60) for long-lasting performance.
- • **Seamless Assembly:** Join blocks without exposed hardware for a clean, professional look.
- • **Convenient Storage:** Comes in a telescoping plastic storage tube for easy organization.
- • **Unmatched Precision:** Achieve flawless setups with tolerances as tight as +/- 0.0001".
- • **Versatile Applications:** Perfect for machine setup, layout, and inspection—endless possibilities await!

## Overview

The Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit is a versatile and precision-engineered solution for machine setup, layout, and inspection. Made from hardened tool steel with exceptional tolerances, this kit includes 123 blocks with 23 through holes and a comprehensive hardware kit for seamless assembly. Perfect for professionals seeking reliability and efficiency in their workshop.

## 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” and a 9/64” hex key.   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. A small straight slot screwdriver 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.

## 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.

## Images

![Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit - Image 1](https://m.media-amazon.com/images/I/71CptXwPnwL.jpg)
![Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit - Image 2](https://m.media-amazon.com/images/I/81I7CepoAPL.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/71Hsym6vAeL.jpg)
![Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit - Image 5](https://m.media-amazon.com/images/I/71cJDeKNbjL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Well made and square
*by R***W on February 19, 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.

### ⭐⭐⭐⭐⭐ a must-have modeler tool.  Get two sets!
*by M***N on July 22, 2025*

These are must have for model railroad and other similar craft tasks. Heavy for bracing and holding and precise for squaring the work.

### ⭐⭐⭐⭐⭐ Precision made
*by T***L on September 21, 2025*

Another great Taytools product!

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- Taytools Pair Hardened Steel 123 Blocks and Attachment Hardware Kit
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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-02-09*