The Festool 492540 Centrotec Bit Extension is a 6 inch magnetic bit holder built for driving screws in hard-to-reach spots while keeping the speed and control of the FESTOOL CENTROTEC system. This is a bit holder designed for screwdriving and extended-reach fastening. Model Number: 492540. If you already run a Festool cordless drill with a CENTROTEC interface, this accessory gives you a simple way to use standard bits without giving up quick bit changes.

What matters here is not just the extra length. The 6 inch body gives you better access inside cabinets, between framing members, and around hardware where the drill chuck itself gets in the way. That makes the Festool 492540 Centrotec Bit Extension useful for installers, finish carpenters, cabinet crews, and service work where awkward screw locations slow you down more than raw drilling power ever will.

The magnetic insert holds standard bits in place so they stay put when you are working overhead or reaching into tight spaces. Festool also calls out the precision milled hex shank, which is there for a reason: less wobble and less runout during use. In practical terms, that means better screw engagement, cleaner starts, and less chance of cam-out when you are working with longer reach and need the bit to stay steady.

One of the big advantages of this extension is how it bridges systems. It adapts standard insert bits to the quick-change capability of the CENTROTEC setup, but the CENTROTEC shank can also be used in standard or keyless chucks for no-slip performance. That gives you more flexibility if your workflow moves between FESTOOL CENTROTEC tools and more conventional drill chucks.

Festool positions the CENTROTEC system around efficient force transfer, reduced slippage, and faster changes than typical quick-change chuck setups. With this extension, you keep those benefits while gaining reach. For anyone who uses a drill for a lot of repetitive fastening, that means less time wrestling the tool into position and less time changing accessories.

The build is straightforward and purpose-driven: metal construction, magnetic bit retention, and a long hex shank that is meant to stay stable under load. It is not a general-purpose gimmick accessory. It is for users who know exactly why extra reach matters and want that reach without a sloppy connection between tool, holder, and bit.

This accessory makes the most sense for Festool users who already own a CENTROTEC chuck or a compatible Festool cordless drill. It is also a solid fit for pros doing cabinet installation, trim work, hardware installation, punch-list work, and light assembly tasks where reach, bit stability, and quick changes matter more than brute force. If that sounds like your day-to-day work, this extension earns its spot in the drill case fast.

Festool 492540 Centrotec Bit Extension for Faster, Cleaner Access

This is one of those small accessories that solves a real jobsite problem: getting a standard bit where the drill itself does not want to fit.

• Who it's for: Festool users running the CENTROTEC system, especially cabinet installers, trim carpenters, and anyone doing a lot of screwdriving in cramped spaces.
• Why it stands out: You get 6 inches of reach, magnetic bit retention, and a precision hex shank that helps keep wobble down instead of turning the setup sloppy.
• Worth knowing: This is an accessory, not a universal miracle attachment. It makes the most sense if you already use a FESTOOL CENTROTEC chuck or want a cleaner way to run standard bits with compatible chucks.

• What kind of tool is this? It is a 6 inch magnetic bit holder and bit extension designed for screwdriving with standard bits.
• Will it work with standard bits? Yes. It is designed to adapt standard bits to the quick-change capability of the FESTOOL CENTROTEC system.
• Does it only fit FESTOOL CENTROTEC tools? It is suitable for Festool cordless drills with the CENTROTEC interface, and the CENTROTEC shank can also be used in standard or keyless chucks.
• What chuck size is required? The minimum chuck size required is 3/8 in.