These bits are amazing. Even in woods known for poor abrasion, like oak, they produce beautifully finished round onlays. Even on poorly burning woods such as cherry or maple, they leave practically no burn marks.
The ad doesn't say more. It does an amazing job of making clean cuts. I cut through the cross grain on red oak and do the whole bite in one pass. No break. I will be gradually buying this Quadra Cut to replace others as they wear out. You will not regret buying this baby.
The new 4-blade technology incorporated in this cutter offers excellent burn-free performance. Cutting is quick and without the annoying tearing that often occurs with end-grain wood and when working against the grain.