---
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: "€ 197.28"
currency: EUR
in_stock: true
reviews_count: 6
category: "E Diamond Tools"
url: https://www.desertcart.at/products/375137751-dry-core-bit-for-brick-and-concrete-block-with-pilot
store_origin: AT
region: Austria
---

# 9.5" drilling depth for deep, efficient cores High #30/40 diamond grit for ultimate durability 1/2" shank pilot bit adapter for precise control Dry Core Bit for Brick and Concrete Block with Pilot Bit - 4" Diameter - 1/2" Shank Arbor - #30/40 Diamond

**Brand:** ediamondtools
**Price:** € 197.28
**Availability:** ✅ In Stock

## Summary

> 💎 Drill smarter, not harder — core like a pro with EDiamondTools!

## 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?** € 197.28 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/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 lets you tackle thick masonry with confidence.
- • **Heavy-Duty Performance:** Built tough to handle demanding jobs without compromising efficiency—your go-to for serious masonry work.
- • **Versatile Wet or Dry Use:** Optimized for both wet and dry drilling on handheld or rig-mounted core drills (rotary mode only).
- • **Diamond-Infused Durability:** Embedded #30/40 grit diamonds ensure longer life and faster drilling through brick and block.
- • **Precision Pilot Bit Adapter:** 1/2" shank adapter guarantees steady, accurate starts every time.

## Overview

The EDiamondTools 4" Dry Core Bit features a high concentration #30/40 diamond 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 designed for rotary mode use on handheld or rig-mounted core drills. Heavy-duty and versatile for wet or dry applications, this bit is engineered to deliver professional-grade performance on every job.

## 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 301 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 | 4.81 Pounds |
| Manufacturer | EDiamondTools |
| Material | Diamond |
| Material Type | Diamond |
| Minimum Bore Diameter | 0.63 Inches |
| Model | DBP0400A5ADJ14 |
| Number of Flutes | 2 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| 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

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

## 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.

### ⭐⭐⭐⭐⭐ Great Core Bit - five stars
*by M***. on 21 September 2021*

I ordered the 4.25 core bit with pilot so I could install a 4" dryer vent in my new house. I'm so glad I went with 4.25" but instead of 4" (I actually got the idea from these reviews on Amazon). The little bit of space around the duct was so helpful. I had to drill through 8" of hard concrete. I asked for quotes from several plumbers and a few local "handymen", nobody even wanted to quote this! They said it would be a huge project and really difficult. Well, this core bit did the job in less than ten mins! Literally 9 mins. I was amazed. A few things I will note, DEFINITELY use a powerful drill. I rented a 1" roto hammer drill from home depot for $40, wellll worth it. It went through 8 inches of concrete like it was butter. Another thing, if you use a hammer drill, you prob need to order an adapter. I made the mistake of not ordering this until AFTER I received the core bit, and I was forced to wait a few more days until the adapter was delivered (wasn't available in any local stores). Also, the adapter couldn't fit the pilot bit, so I took the advice of some of these reviews and I made a "holder" out of a wood plank (see photo). During the initial drilling, the bit would've jumped all over the place and damaged the wall if I didn't use this idea. I can't really speak for the longevity of this core bit, but I drilled through 8 inches of hard concrete and the bit still looks perfect.

## 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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*Product available on Desertcart Austria*
*Store origin: AT*
*Last updated: 2026-10-10*