Tungsten-carbide-tipped wood boring drill bits, in a time-tested forstner design. For drilling large diameter holes in timber, you just can't beat them.
Each bit has thick 3mm TCT cutting tips and flutes, which dramatically improves performance and durability - staying sharper far longer than regular carbon-steel forstner-style bits. Not only will these bits out-drill the number of holes compared to carbon-steel bits by a factor of 10-to-1 or more, they are designed to be run in a drill as fast as possible, meaning boring speeds far outstrip carbon steel bits.
Carbon Steel Bits? Pfft, there's just no competition.
The finish left is smooth, with minimal burning or tear-out and works equally well along or on end-grain or in difficult materials such as ply etc.
Overall length of the bits are 91mm with boring capacity approximately 65-70mm. The 35mm bit is used to hinge sink European self-closing kitchen hinges.