For drilling large diameter holes in timber you cannot beat a tungsten boring bit.
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.
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.