The Bosch PRO SDS max-9 BreakThrough drill bit, Ø 65 mm (working length 450 mm) is a specialized drill bit for impact drilling in concrete and stone, designed for use with power tools that support SDS max clamping. It is intended for users who need a powerful tool for larger holes in hard materials - these can be craftsmen, builders or DIYers on larger renovation or construction projects. The main advantage is the ability to efficiently and quickly drill large holes where conventional drill bits fail due to their diameter or length.

Due to its larger diameter and extended working length, it enables penetrations through thicker walls, foundations or massive elements, which is often necessary when assembling installations or laying cables. The SDS max system ensures efficient energy transfer from the hammer to the drill bit, which reduces work effort and contributes to better results even with long-term use.

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The combination of a diameter of 65 mm and a long working part (450 mm) allows for extensive penetrations through thick walls, which significantly reduces the working time when laying large installations or ventilation pipes. Thanks to the SDS max system, the tool is compatible with most professional hammers that support high impact energies, ensuring fast material removal and less strain on the user.

The specialized blade geometry and durable material ensure a long service life even with continuous use in the most demanding conditions. This means that you can drill without additional stops even in very hard concrete or natural stone, where standard drill bits would quickly wear out or even be damaged.

In practice, this means that the product will be most useful for tasks such as making penetrations for larger pipes, electrical cables or ventilation in industrial, residential and commercial buildings. Users who often encounter thick concrete or stone walls will appreciate that they can get the job done efficiently and reliably with a single drill without frequent tool changes or wasting time due to interruptions.

It is important to know

The Bosch PRO SDS max-9 BreakThrough drill bit, Ø 65 mm, is a highly specialized tool for demanding drilling tasks in concrete or stone. It will be of most use to users who often make larger breakthroughs or need a longer working length. Before purchasing, check the compatibility with your tool and the suitability of the dimensions for the planned work.

• The large diameter (65 mm) and long working length are mainly suitable for larger penetrations (e.g. pipe or cable passages), less so for precise or fine work.
• A powerful impact drill with an SDS max chuck is required – the drill bit is not usable with tools with smaller or conventional SDS-plus chucks.
• Improper use on less durable materials or with an underpowered tool can lead to jamming or shortening of the drill bit's life.
• Due to its size, the drill is less effective in narrow or hard-to-reach spaces – it requires more space to use.

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In practice

🏗️ Construction works and breakthroughs

🟢 Designed for drilling larger holes in concrete, masonry or stone structures - suitable for installations and similar projects.

🏠 Major home renovations

🟡 Useful if you often do more demanding drilling work at home and have powerful professional tools; too big for occasional minor repairs.

🔧 Crafts and professional contractors

🟢 Suitable for plumbers, electricians and builders who regularly install larger systems through reinforced concrete or stone.

Answers to frequently asked questions

Is the drill bit compatible with regular SDS-plus drills?

No, this drill bit is only suitable for drills with an SDS max chuck.

Is it suitable for drilling through rebar in concrete?

The drill bit allows for penetration into reinforced concrete, but it is recommended to consider the tool's limitations and use a high-quality professional hammer drill.

What to do if the drill bit jams while working?

If a jam occurs, stop work immediately, check the power of the tool and the suitability of the drilling method; using a machine that is too weak can damage the drill bit and the tool.

How to maintain such a large drill?

After use, clean it of any material residue and store it in a dry place to prevent corrosion and damage to the blades.

What materials is this drill bit not suitable for?

It is not suitable for drilling into wood, metal or ceramics; it is intended exclusively for concrete, masonry and natural stone.

Description updated: July 2026

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