The Festool 492523 CENTROTEC Countersink Drill Bit with Depth Stop 3.5 mm is a drill countersink built for drilling and countersinking screw holes in one setup. This is a drill countersink designed for controlled wood fastening and clean screw seating. Model Number 492523. If you are working with Festool cordless drills that use the CENTROTEC interface, this accessory is made to speed up prep work while giving you better consistency from hole to hole.

The big selling point here is adjustability. The 3.5 mm bit is paired with a depth stop, so you can dial in how deep the countersink goes instead of guessing as you work. That matters on finish work, cabinet installs, and trim applications where screw heads need to sit right without chewing up the face of the material. The free-spinning depth stop is also a practical feature, because it helps reduce burning and marring on the finished surface as the tool makes contact.

Festool also built this countersink around the CENTROTEC system, which is really about cleaner power transfer and faster changes. The shank is designed for use with Festool CENTROTEC tool chucks, but it can also run in standard or keyless chucks. In real use, that gives you flexibility if you are moving between setups. The long precision milled hex shank is there for a reason too: it helps cut down on wobble and runout, which means the bit tracks more accurately and feels more controlled while drilling.

Another smart part of this design is serviceability. Instead of replacing the whole assembly when the bit wears out, Festool notes that you only need to replace the bit. That makes more sense for anyone who uses countersinks regularly and wants to keep the holder and depth stop setup they already like. Over time, that can save money compared to throwing away a full one-piece assembly every time the cutting edge is done.

In day-to-day shop or jobsite use, this is the kind of accessory that helps tighten up your process. You are not just drilling a pilot hole. You are also setting up the screw head to sit properly, and doing both steps with one accessory keeps the workflow moving. The 3.5 mm diameter is sized for common screw-prep work where clean, repeatable fastening matters more than brute-force drilling speed.

Compatibility is straightforward and important here. This Festool countersink drill bit is suitable for Festool cordless drills with the CENTROTEC interface and is intended for use in the WH-CE CENTROTEC tool chuck. Because the shank can also be used in standard or keyless chucks, it is not locked into just one setup, but the best fit is clearly within the Festool CENTROTEC platform.

Who should buy it? Woodworkers, cabinet installers, finish carpenters, and serious DIY users who care about screw placement and finished appearance will get the most out of it. If you already run Festool CENTROTEC and want a cleaner, faster way to drill and countersink for wood screws, this is the right type of accessory. If you only need an occasional rough pilot hole and do not care about countersink depth or surface quality, it is probably more tool than you need.

Festool 492523 CENTROTEC Countersink Drill Bit with Depth Stop 3.5 mm for cleaner fastening work

This is a smart add-on for anyone already in the Festool CENTROTEC system who wants faster, cleaner, more repeatable countersunk screw holes in wood.

• Who it's for: Finish carpenters, cabinet installers, woodworkers, and detail-focused DIY users who care how screw heads sit in the material.
• Why it stands out: The adjustable depth stop, free-spinning nose, and low-runout shank solve the small problems that make visible fastening work look sloppy.
• Worth knowing: This is an accessory built around the CENTROTEC setup, so it makes the most sense if you already use Festool drills and want that system advantage.

• What kind of product is this? It is a 3.5 mm drill countersink with an adjustable depth stop for drilling and countersinking screw holes.
• What drills is it made for? It is suitable for Festool cordless drills with the CENTROTEC interface and for use in the WH-CE CENTROTEC tool chuck.
• Can it be used in a regular chuck? Yes. Festool states the CENTROTEC shank can also be used with standard or keyless chucks.
• What helps protect the finished surface? The depth stop rotates freely, which helps reduce burning or marring on the work surface.