These forstner bits are superior because they come in a common metric size!
Forstner bits are superior bits for drilling wood because they are guided by the rim and not a centre-point. Hence they are not deflected easily by the natural differences in hardness found in timber such as knots or strong grain patterns. They can be used to be bore in any direction and are extremely useful for boring holes on an angle or to true up and increase the size of an existing hole or timber imperfection.
The design permits large chip clearance easily and this combined with their ability to track truly makes them especially suited for drilling deep or extra large diameter holes. Extension bars are available for this purpose.
The common issue many people have with forstners is the cost factor - if you're only drilling flat-bottom holes on a semi-regular basis than many people try to avoid the initial outlay. We can proudly say that after 30 years, these forstners offer excellent value for money, at a cheaper cost than almost all of our competitors, without sacrificing the quality and genuine reliability that makes a forstner so worth having in the first place.
All the bits in the set are true forstner bits up to 22mm, with all bits 25mm and larger having a sawtooth design.
A sawtooth design makes them able to cut more easily when drilling with the grain (such as through end-grain). They still retain clean cutting characteristics when used drilling across the grain but just not as clean as a true forstner bit - although acceptable for virtually all wood boring.
Beware of other metric sets and included sizes!
We have selected the fifteen most popular and common metric forstner bit sizes so that you have the most useful set in the one purchase. Make sure you compare the sizes before buying.
Sizes included in this set are - 10mm, 12mm, 13mm, 16mm, 19mm, 22mm, 25mm, 28mm, 30mm, 32mm, 35mm, 38mm, 40mm, 45mm and 50mm.
Forstner bit sharpening
Sharpen by running a small flat diamond plate along the horizontal scraper cutter keeping the angle constant. The rim needs less frequent sharpening but can be touched up using a round file or diamond stone on the inside. Never grind or touch up the outside of the bit.