I thought unibits and stepbits were same thing? I have the "unibits " and love them as the holes are round and cuts fast.
They are. "Unibit" is actually a brand name. They're ok if you're drilling in relatively thin material and don't want to pack around a bunch of bits. Personally, I prefer regular bits for most of my drilling, and the Blair Rotabroach hole cutters for anythng I'm doing in sheetmetal, as they leave a burr free perfectly round hole.