---
product_id: 66890330
title: "Bosch 2608587521 1/4-Inch Quick Change Hex Shank Extension for Self Cut Speed Spade Bits"
brand: "bosch"
price: "B/.111"
currency: PAB
in_stock: true
reviews_count: 13
category: "Bosch"
url: https://www.desertcart.com.pa/products/66890330-bosch-2608587521-1-4-inch-quick-change-hex-shank-extension
store_origin: PA
region: Panama
---

# Drills 3x faster with self-feeding tip 1/4" hex shank ISO 1173 E6.3 Toughened cobalt steel build Bosch 2608587521 1/4-Inch Quick Change Hex Shank Extension for Self Cut Speed Spade Bits

**Brand:** bosch
**Price:** B/.111
**Availability:** ✅ In Stock

## Summary

> ⚡ Drill faster, reach farther, lock tighter — Bosch means business.

## Quick Answers

- **What is this?** Bosch 2608587521 1/4-Inch Quick Change Hex Shank Extension for Self Cut Speed Spade Bits by bosch
- **How much does it cost?** B/.111 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/66890330-bosch-2608587521-1-4-inch-quick-change-hex-shank-extension)

## Best For

- bosch enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Crafted from specially toughened cobalt steel for unmatched durability and resistance to warping.
- • **Reach the Unreachable:** Extension lets you drill deep or awkward spots effortlessly, expanding your toolkit’s versatility.
- • **Speed Meets Efficiency:** Patent-pending self-feeding threaded tip drills through wood 3x faster than standard spade bits.
- • **Precision Lock & No Twist:** Secure quick-change hex shank locks bits firmly—no wobble or slippage under load.
- • **Engineered for Professionals:** ISO-standard hex shank ensures compatibility and precision with all major power tools.

## Overview

The Bosch 2608587521 1/4-Inch Quick Change Hex Shank Extension is a premium accessory designed for self cut speed spade bits. Engineered with a patent-pending self-feeding threaded tip and precision-ground cutting edges, it drills through soft and hard wood up to three times faster than standard bits. Made from specially toughened cobalt steel and featuring an ISO 1173 E6.3 hex shank, this extension guarantees durability, secure bit locking, and compatibility with most power tools. Ideal for professionals tackling deep or hard-to-reach drilling tasks, it delivers reliable performance and long-lasting build quality.

## Description

Product Description Bosch is a leading manufacturer of accessories for power tools and is an innovation leader with 125 years of tradition. Bosch's aim is to develop innovative accessories for all applications, for more efficient working and for new materials. With more than 8000 products, Bosch offers the appropriate accessories for virtually all applications, users and all brands of power tools. Suitable for soft and hard wood, light building materials and plasterboard;Drills three times as fast as standard spade bits;Patent pending, self-feeding threaded tip and cutting geometry;Manufactured in accordance with own factory standards from specially toughened steel;Precision-ground tip and cutting edges for accurate dimensional stability when drilling;1/4" hex shank manufactured to ISO 1173 E6.3;Drill bit colour: grey, sand-blasted Box Contains 1 x Quick-change 1/4" hex shank extension for Self Cut Speed spade bits

Review: Solid, durable extension – no twisting under load and secure bit locking - Pricey for what it is, but the build quality definitely justifies it. I’ve been using this extension for around a year now, mainly with larger spade bits, and it’s held up really well. There are no signs of warping or twisting, which is something I’ve experienced with cheaper extensions when putting them under load. The locking mechanism is solid and reliable. The bits click firmly into place, similar to an impact driver chuck, and I’ve not had a single spade bit come loose during normal use. That alone makes a big difference when you’re drilling repeatedly or overhead. One thing to note, this applies to most extension bits, not just this one, if you’re using smaller spade bits (around 16–20mm), you can occasionally run into an issue when pulling out of a hole packed with wood chips. The resistance can cause the sliding lock to release, leaving the spade bit stuck in the hole. To avoid this, either clear the hole regularly while drilling, or wrap some electrical tape around the sliding lock to keep it from moving It’s not a dealbreaker, and like I said, it’s something I’ve seen across multiple brands, not specific to this one. Overall, it’s a simple bit of kit, but if you regularly use spade bits, especially larger sizes it’s well worth spending a bit extra on something that won’t let you down.
Review: Great for hard to reach jobs - ⭐️⭐️⭐️⭐️⭐️ Handy little extension – strong and super easy to use! Picked this up to use with my Bosch spade bits, and it’s been brilliant. The quick-change mechanism is smooth and holds the bits tight—no wobble, no slipping. It’s especially useful when you’re drilling in awkward spots or through deeper timber where the standard bit just won’t reach. Feels solid and well-made, like you'd expect from Bosch. Great little add-on for the toolbox. If you're using self cut spade bits, this makes the job way easier and more flexible.

## Features

- As a leading manufacturer for power tools accessories, Bosch offers the ideal accessories for virtually all applications
- It is our aim to develop appropriate accessories for more efficient working
- The research and development departments at Bosch work to develop and optimise accessories in line with the needs of users

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B008HRHTCK |
| Best Sellers Rank | 80,601 in DIY & Tools ( See Top 100 in DIY & Tools ) 41 in Hex-shank Drill Bits |
| Brand | Bosch |
| Country Of Origin | Taiwan |
| Customer Reviews | 4.4 out of 5 stars 303 Reviews |
| Finish Types | Silver |
| Finish type | Silver |
| Global Trade Identification Number | 03165140638838 |
| Item Dimensions | 45 x 40 x 15 centimetres |
| Item Type Name | Quick-change 1/4" hex shank extension for Self Cut Speed spade bits |
| Item Weight | 0.01 Kilograms |
| Item dimensions L x W x H | 45 x 40 x 15 centimetres |
| Manufacturer | Bosch |
| Manufacturer Part Number | 2608587521 |
| Material | Cobalt Steel |
| Model Number | 3165140638838 |
| Number of Flutes | 1 |
| Number of Pieces | 1 |
| Shank Type | HEX |
| Shank type | HEX |
| Surface Recommendation | Wood |
| Tool Flute Type | Spiral |
| Tool flute type | Spiral |
| Unit Count | 1.0 count |

## Product Details

- **Brand:** Bosch
- **Cutting diameter:** 6.35 Millimetres
- **Finish type:** Silver
- **Material:** Cobalt Steel
- **Shank type:** HEX

## Images

![Bosch 2608587521 1/4-Inch Quick Change Hex Shank Extension for Self Cut Speed Spade Bits - Image 1](https://m.media-amazon.com/images/I/415jai9AAwL.jpg)

## Available Options

This product comes in different **Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Solid, durable extension – no twisting under load and secure bit locking
*by J***E on 6 April 2026*

Pricey for what it is, but the build quality definitely justifies it. I’ve been using this extension for around a year now, mainly with larger spade bits, and it’s held up really well. There are no signs of warping or twisting, which is something I’ve experienced with cheaper extensions when putting them under load. The locking mechanism is solid and reliable. The bits click firmly into place, similar to an impact driver chuck, and I’ve not had a single spade bit come loose during normal use. That alone makes a big difference when you’re drilling repeatedly or overhead. One thing to note, this applies to most extension bits, not just this one, if you’re using smaller spade bits (around 16–20mm), you can occasionally run into an issue when pulling out of a hole packed with wood chips. The resistance can cause the sliding lock to release, leaving the spade bit stuck in the hole. To avoid this, either clear the hole regularly while drilling, or wrap some electrical tape around the sliding lock to keep it from moving It’s not a dealbreaker, and like I said, it’s something I’ve seen across multiple brands, not specific to this one. Overall, it’s a simple bit of kit, but if you regularly use spade bits, especially larger sizes it’s well worth spending a bit extra on something that won’t let you down.

### ⭐⭐⭐⭐⭐ Great for hard to reach jobs
*by B***Y on 13 October 2025*

⭐️⭐️⭐️⭐️⭐️ Handy little extension – strong and super easy to use! Picked this up to use with my Bosch spade bits, and it’s been brilliant. The quick-change mechanism is smooth and holds the bits tight—no wobble, no slipping. It’s especially useful when you’re drilling in awkward spots or through deeper timber where the standard bit just won’t reach. Feels solid and well-made, like you'd expect from Bosch. Great little add-on for the toolbox. If you're using self cut spade bits, this makes the job way easier and more flexible.

### ⭐⭐⭐⭐⭐ Perfect
*by C***A on 11 February 2026*

Strong sturdy perfect extension an holds bits well

## Frequently Bought Together

- Bosch 2608587521 1/4-Inch Quick Change Hex Shank Extension for Self Cut Speed Spade Bits
- Bosch 13x EXPERT Self Cut Speed Spade Drill Bit Set (for Softwood, Particleboard, Ø 10-32 mm, Professional Accessory Rotary Drill/Drivers)

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*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-10-29*