My Shopfox slotter came with a 1/2" chisel and drill that smoked like crazy in the oak and ash I cut. , but was dirty and constantly overheated. No matter how sharp it was or how slow I drilled, no matter how far I adjusted the drill bit, it always smoked and heated up in any hard wood. It smoked in pine but not like that. I bought this set knowing iSh was wrong and OH MAN PLEASE TELL YOU WHAT! :) Sharp as soon as possible, ready to use and polished to perfection. Soooo much smoother running and grooving from these bits. I've only used 1/2" and 3/8" so far but don't regret the extra dollars they cost compared to "unbranded" offerings.