We use 7/64 inch bits like crazy, my husband tends to push them too hard when working with hardwood or metal and they break on the shank so it always seems what I buy more We made the cheap Harbor Freight versions but the Irwin brand isn't much more expensive and will hold a sharp point longer than the cheaper ones. They also seem to have better breaking strength...even if my husband uses them now, if I could teach him to apply a little less pressure I wouldn't buy them as often!