---
product_id: 375137751
title: "Dry Core Bit for Brick and Concrete Block with Pilot Bit - 4\" Diameter - 1/2\" Shank Arbor - #30/40 Diamond"
brand: "ediamondtools"
price: "£116.81"
currency: GBP
in_stock: true
reviews_count: 6
category: "E Diamond Tools"
url: https://www.desertcart.co.uk/products/375137751-dry-core-bit-for-brick-and-concrete-block-with-pilot
store_origin: GB
region: United Kingdom
---

# High diamond grit #30/40 Optimized for soft brick & block 1/2" shank pilot bit adapter Dry Core Bit for Brick and Concrete Block with Pilot Bit - 4" Diameter - 1/2" Shank Arbor - #30/40 Diamond

**Brand:** ediamondtools
**Price:** £116.81
**Availability:** ✅ In Stock

## Summary

> 💎 Drill smarter, last longer — the pro’s choice for flawless masonry cores!

## Quick Answers

- **What is this?** Dry Core Bit for Brick and Concrete Block with Pilot Bit - 4" Diameter - 1/2" Shank Arbor - #30/40 Diamond by ediamondtools
- **How much does it cost?** £116.81 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/375137751-dry-core-bit-for-brick-and-concrete-block-with-pilot)

## Best For

- ediamondtools enthusiasts

## Why This Product

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

## Key Features

- • **Deep Core Capacity:** 9.5" drilling depth tackles thick brick and block with ease
- • **Versatile Rotary-Only Use:** Designed exclusively for rotary mode to maximize performance and bit longevity
- • **Diamond-Infused Durability:** Embedded #30/40 grit diamonds for longer life & efficient drilling
- • **Multipurpose Masonry Master:** Perfect for soft brick and concrete blocks—your go-to for professional-grade coring
- • **Precision Pilot Bit Adapter:** 1/2" shank adapter ensures exact, stable drilling every time

## Overview

The EDiamondTools 4" Dry Core Bit features a high diamond concentration (#30/40 grit) for extended durability and efficient drilling through soft brick and concrete blocks. Equipped with a 1/2" shank pilot bit adapter and a 9.5" drilling depth, it’s optimized for rotary mode use with handheld or rig-mounted core drills. Engineered for professionals demanding precision and longevity in masonry coring.

## Description

Dry diamond core bits with #30/40 grit high diamond concentration guarantees longer coring life and efficient drilling. Designed for drilling soft brick or building block. 10mm segment height and 9.5" drilling depth with 5/8"-11 threaded arbor. 1/2" chuck pilot bit adapter included. Use wet or dry with handheld core drills or dedicated core drill rigs in rotary mode only.

Review: original and very good quality - all good
Review: It worked - It worked. I was able to drill through triple brick. It took awhile, and I would suggest stopping from time to time and allow the bit to cool down. There is a sticker affixed to it that specifically says not to use the hammer drill function, so heed its warning. Only downside is it’s a bit heavy, which I’m sure all coring bits are. It’s a workout on your arms for sure.

## Features

- MULTIPURPOSE - designed to drill soft brick and building block
- PILOT BIT ADAPTER - includes 1/2" shank pilot bit adapter
- HEAVY DUTY - embedded diamond concentration guarantees longer core life and efficient drilling
- GRIT SIZE - #30/40 grit size
- DRILLING DEPTH - 9.5" drilling depth
- WET OR DRY - recommended to use with handheld core drills or dedicated core drill rigs (rotary mode only)
- ROTARY MODE ONLY - please only use rotary mode with our core bits

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01N397RRT |
| Brand | EDiamondTools |
| Brand Name | EDiamondTools |
| Customer Reviews | 4.3 out of 5 stars 474 Reviews |
| Cutting Angle String | 118 Degrees |
| Cutting Diameter | 10 Millimeters |
| Cutting angle string | 118 Degrees |
| Cutting diameter | 10 Millimeters |
| Finish Types | Diamond |
| Finish type | Diamond |
| Item Dimensions | 29.5 x 10.5 x 10.5 centimeters |
| Item Weight | 2.18 kg |
| Manufacturer | EDiamondTools |
| Material | Diamond |
| Material Type | Diamond |
| Minimum Bore Diameter | 0.63 Inches |
| Model | DBP0400A5ADJ14 |
| Number of Flutes | 2 |
| Part Number | DBP0400A5ADJ14 |
| Shank Type | Threaded |
| Shank type | Threaded |
| Surface Recommendation | Brick, Concrete |
| Tool Flute Type | Spiral |
| UPC | 727363142900 |
| Unit Count | 1 Count |

## Product Details

- **Material:** Diamond
- **Cutting diameter:** 10 Millimeters
- **Finish type:** Diamond
- **Shank type:** Threaded
- **Cutting angle string:** 118 Degrees

## Images

![Dry Core Bit for Brick and Concrete Block with Pilot Bit - 4" Diameter - 1/2" Shank Arbor - #30/40 Diamond - Image 1](https://m.media-amazon.com/images/I/51UyxWNjloL.jpg)
![Dry Core Bit for Brick and Concrete Block with Pilot Bit - 4" Diameter - 1/2" Shank Arbor - #30/40 Diamond - Image 2](https://m.media-amazon.com/images/I/81ONL2n3xQL.jpg)
![Dry Core Bit for Brick and Concrete Block with Pilot Bit - 4" Diameter - 1/2" Shank Arbor - #30/40 Diamond - Image 3](https://m.media-amazon.com/images/I/81ovKmRmbnL.jpg)
![Dry Core Bit for Brick and Concrete Block with Pilot Bit - 4" Diameter - 1/2" Shank Arbor - #30/40 Diamond - Image 4](https://m.media-amazon.com/images/I/81XMkwpMnGL.jpg)
![Dry Core Bit for Brick and Concrete Block with Pilot Bit - 4" Diameter - 1/2" Shank Arbor - #30/40 Diamond - Image 5](https://m.media-amazon.com/images/I/81ovp0J6exL.jpg)

## Available Options

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

## Questions & Answers

**Q: Will this work with a cordless impact drill?  (DeWalt)**
A: Depending on the size of core bit , I used a 4 1/2 core bit , and I don't think you would have enough power . And you may over heat the drill , and go threw a lot of batteries.

**Q: Will this cut through stucco? i think it's 1/2 to 3/4 inches thick. based on info i see on the questions, it appears that it will.**
A: It sure will I cut through 17 1/2 inches of cement and rebar, no problem just took time!!

**Q: What size is the set screw that holds drill bit in arbor?**
A: 3/16” Allen wrench

**Q: What is your return policy if not used**
A: Amazon return policy

## Customer Reviews

### ⭐⭐⭐⭐ original and very good quality
*by S***D on 4 March 2023*

all good

### ⭐⭐⭐⭐⭐ It worked
*by K***S on 14 December 2024*

It worked. I was able to drill through triple brick. It took awhile, and I would suggest stopping from time to time and allow the bit to cool down. There is a sticker affixed to it that specifically says not to use the hammer drill function, so heed its warning. Only downside is it’s a bit heavy, which I’m sure all coring bits are. It’s a workout on your arms for sure.

### ⭐⭐⭐⭐⭐ Worked just as advertised
*by T***A on 17 September 2024*

I only needed to drill one hole in the concrete. This worked perfect. I decided to keep the area wet to cool the bit and keep down the dust. It worked just as expected. It took about 10 minutes to drill through 4" concrete floor. I took short breaks in this time to pour water on it. I do recommend using at least a 1/2" drill with good power. Also, if you use water remember to use a GFCI outlet or cord.

## Frequently Bought Together

- 4" Dry Diamond Core Drill Bits for Brick and Block with 1/2" Shank Pilot Bit Adapter, 9.5" Drilling Depth, 5/8"-11 Arbor
- SHDIATOOL Core Drill Bit Adapter 5/8 inch-11 Thread Male to SDS Plus Shank for SDS Plus Drills
- Toolocity cbadptr_0038 Adapter For Core Bits-5/8"-11 To 3/8" Triangle Shank, Black

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**Shop now:** [https://www.desertcart.co.uk/products/375137751-dry-core-bit-for-brick-and-concrete-block-with-pilot](https://www.desertcart.co.uk/products/375137751-dry-core-bit-for-brick-and-concrete-block-with-pilot)

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*Product available on Desertcart United Kingdom*
*Store origin: GB*
*Last updated: 2026-07-14*