They stay sharp and cool, delivering smooth cuts in one pass in softwoods up to 3/8 inch, clean cuts with heat or rubber in most hardwoods. More even contact makes the workpiece less wobbly and feels better in your hand. If you do a lot of carpentry work, you might want to get off your straight cuts and get a set of these. Warning, these are CARBIDES and not carbide tips, so don't do that. Throw them away because they can break if hit hard enough.