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forstner bit

$29.65 excl. tax

Made for unifit series single. Creates clean, flat-bottom holes in wood. Ideal for furniture, cabinetry, and architectural joinery.

forstner bit
forstner bit
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Small parts, aligned to the same spatial logic. Rings, holders, drivers and cover plates connect every light and outlet to its surface and its system. Built from the inside out, so only the essentials show.

Meet forstner bit


Surface installation requires a 1-3/8” (Ø35 mm) bit. For flush mounting, first use a 1-1/2” (Ø38 mm) bit to create the countersink, then a 1-3/8” (Ø35 mm) bit for the hole.

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Create flat-bottom holes in wood (video)

Create flat-bottom holes in wood (video)

Unifit forstner bit
Installation advice

Unifit forstner bit

Drill with care. For best results, apply painter's tape over the area to prevent tear-out, then use a drill press for accurate alignment and clean edges. If using a handheld drill, keep it perpendicular to the surface. 

Always test on a scrap piece of wood before drilling the final workpiece. For flush installations, drill the 1-1/2" (Ø38 mm) countersink to a depth of 1/10" (2.5 mm), followed by the 1-3/8" (Ø35 mm) hole, ensuring both remain perfectly centered by not moving the workpiece between steps. Drill at moderate speed and avoid excessive pressure.


Alternatively, the countersink can be cut with a rabbeting router bit, for both single and duplex. Set the bit depth to 1/10" (2.5 mm) and rout around the pre-drilled or milled opening using a router table or plunge router. 

This method offers consistent depth control and clean edges, making it a great option if you have a router available.

Product Details

forstner bit
Specification
Product family Unifit series
Application Wood
Downloads

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A drill press gives the most accurate and clean results. If using a handheld drill, keep it strictly perpendicular to the surface and use a steady, moderate speed. Always test on a scrap piece first to dial in depth and alignment before drilling the final workpiece.

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Both create the same result. The forstner bit is the simplest option, just a drill and two bits. The rabbeting router bit gives more consistent depth control and cleaner edges, making it the better choice if you’re installing multiple outlets or want extra precision. If you don’t own a router, go with the forstner bit.