What type of shank does this countersink have?

It features a 1/4 inch external hexagon shank, compatible with standard bit holders and the Fein Vario system.

Which screw size is this countersink designed for?

With a maximum diameter of 25 mm, this countersink is specifically designed for M12 countersunk screws.

What is the countersinking angle of this tool?

The countersink angle is 90°, matching standard metric countersunk fasteners.

What material is this countersink made from?

It is manufactured from premium HSS steel to provide high wear resistance during metalworking tasks.

Can this countersink be used with impact drivers?

Yes, its robust geometry and 1/4 inch hex shank make it suitable for use with impact drivers.

FEIN 63901082010 VARIO 90° taper countersink bit 25 mm M12

Name: FEIN 63901082010 VARIO 90° taper countersink bit 25 mm M12
Brand: FEIN
SKU: 08118083
Price: 64.4 EUR
Availability: InStock

Supplier number: FEIN 63901082010 | EAN 4014586476889

Recommended Retail Price €76.96

64.40 tax incl.

€53.22 excl. VAT (incl. all environmental contributions)

On stock - immediately available | we have 3 products in stock.

Ordered before 20:00 - delivered as of 03/10/2026
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

Clean countersinking with Fein VARIO

Practical benefits

Heat resistant protective coating: Thanks to the durable TiAlN coating and high material hardness, the countersink bit retains its edge during demanding tasks.
Built for impact drivers: You can pair this accessory directly with impact drivers using the robust 1/4 inch hex shank connection.
Precise seating for M12: With a 90° countersinking angle and 25 mm diameter, you achieve flush finishes for M12 threaded screws.

In a nutshell

The right choise for

With the Fein Vario countersink bit, you deburr and finish drilled holes in metal, steel, and non-ferrous metals cleanly and accurately. Thanks to the 90° countersinking angle and 25 mm diameter, you seat screws and bolts up to M12 perfectly flush with the material surface, preventing protruding fastener heads. The heat-resistant TiAlN coating and durable hss steel keep the cutting edge sharp through demanding metalworking tasks. Featuring an impact-resistant 1/4 inch male hex shank, it mounts securely into drill drivers and impact drivers without slipping in the chuck.

Product information FAQ

€64.40

In stock - tax incl.

Key features according to our expert

Large diameter: 25 mm
Shank size: 1/4 inch
Shank type: External hexagon
Countersink angle: 90 °

Product description

VARIO 90° taper countersink bit 25.0 mm (M12)
Long service life, thanks to high material strength (64 HRC), special cutting geometries suitable for impact screwdrivers and a TiAlN (titanium-aluminium-nitride) coating. The accessories are low-wear and low-friction as well as heat-resistant up to 800 °C and can therefore be used with high turning and impact frequencies in steel up to 900 N/mm2. Optimally suitable for the following materials: unalloyed and alloyed steels up to 900 N/mm², aluminium, brass.

All Features

Large diameter: 25 mm
Shank size: 1/4 inch
Shank type: External hexagon
Countersink angle: 90 °
ø: 25 mm
L: 67 mm
Strength: 64 HRC
Tool holder: VARIO bit shank
Coating: Titanium-aluminium nitride (TiAlN)
Material: HSS
Heat resistance: max. 800°C

Brand FEIN
08118083
EAN 4014586476889
Supplier number FEIN 63901082010

Frequently asked questions about this product

Answered by specialists

What type of shank does this countersink have?: It features a 1/4 inch external hexagon shank, compatible with standard bit holders and the Fein Vario system.
Which screw size is this countersink designed for?: With a maximum diameter of 25 mm, this countersink is specifically designed for M12 countersunk screws.
What is the countersinking angle of this tool?: The countersink angle is 90°, matching standard metric countersunk fasteners.
What material is this countersink made from?: It is manufactured from premium HSS steel to provide high wear resistance during metalworking tasks.
Can this countersink be used with impact drivers?: Yes, its robust geometry and 1/4 inch hex shank make it suitable for use with impact drivers.