What connection does this extension piece have?

The extension has a 1/2"G connection with internal and external threads for diamond core drills.

How long is this Carat extension piece?

The total length of this extension piece is 300 mm.

What is the minimum drilling diameter for this extension?

For 1/2"G extensions, the minimum drill diameter is 31 mm.

What material is this extension made of?

This extension piece is made of durable steel.

CARAT BC21000000 extension 1/2" 300 mm steel

Name: CARAT BC21000000 extension 1/2" 300 mm steel
Brand: CARAT
SKU: 04013731
Price: 42.2 EUR
Availability: InStock

Supplier number: CARAT BC21000000 | EAN 8714452992753

Recommended Retail Price €58.08

42.20 tax incl.

€34.88 excl. VAT (incl. all environmental contributions)

On stock - immediately available | we have 2 products in stock.

Ordered before 20:00 - delivered as of 05/10/2026
Shipping costs €11.99 VAT included | Free shipping for orders over a total amount of 125 euros
Delivery by DHL
Delivered from Belgium

✆ Talk to a specialist

Extended drilling reach with Carat

Practical benefits

Greater reach for drilling: With a 300 mm length, you easily access deep openings and hard-to-reach areas without losing drilling control.
Standard secure thread connection: The 1/2" threaded mount fits your compatible diamond drills securely to ensure dependable power transmission.
High strength steel construction: Crafted from durable solid steel, this extension withstands heavy torsional loads during demanding core drilling tasks.

In a nutshell

The right choise for

With the Carat BC21000000 extension piece, you easily expand the reach of your diamond core drill. This 300 mm steel extension is the ideal solution when standard bit lengths fall short for deep drilling through concrete, brickwork, or masonry. Thanks to the 1/2"G connection featuring internal and external threads, you maintain a secure, play-free connection and direct power transmission even under heavy torsional loads. Designed for diamond core drilling with a minimum diameter of 31 mm, it allows you to drill through thick exterior walls and concrete floors for HVAC, sanitary, or electrical installations with maximum stability and control.

Product information FAQ

€42.20

In stock - tax incl.

Key features according to our expert

Accessory/Part type: Extension piece
Length: 300 mm
Connection type: External thread
Tool holder size: 1/2"
Tool holder type: Internal thread

Product description:

Extensions
For use of extensions 1/2 "G: minimum bore diameter 31 mm
For usage of extensions 5/4 "UNC: minimum bore diameter 51 mm

All Features

Accessory/part type: Extension piece
Length: 300 mm
Connection type: External thread
Tool holder size: 1/2"
Tool holder type: Internal thread

Brand CARAT
04013731
EAN 8714452992753
Supplier number CARAT BC21000000

Frequently asked questions about this product

Answered by specialists

What connection does this extension piece have?: The extension has a 1/2"G connection with internal and external threads for diamond core drills.
How long is this Carat extension piece?: The total length of this extension piece is 300 mm.
What is the minimum drilling diameter for this extension?: For 1/2"G extensions, the minimum drill diameter is 31 mm.
What material is this extension made of?: This extension piece is made of durable steel.