Я получил набор 3,2 мм (0,13 дюйма), полезный для сверления пилотных отверстий, даже когда я делаю окончательные отверстия в английских единицах измерения - it's not like this. It doesn't matter that it's metric as long as you drill the hole one at a time, increasing the size of the drill bit until you reach the final diameter that the hemp drill bit uses last if you want the hex size. No drill will cut through oil like a hot knife, but this is the closest I've found. Drilling 1-1/2 inch diameter galvanized pipe went very quickly for this bit, and the bit didn't have much of a tendency to wander when opening a hole on this round surface (only a slight tendency). Now I want a full set of graduated drill bits of this nature. This is an incredible purchase that proves that you don't always "get what you pay for", ie the cheapest item can be better than the most expensive. Next question, are there UK sized bits that good at a reasonable price? My rating is based on only using 2 bits from the set.