I've got two BM 710's, 1-M2 and 1-154CM, a BM 556 minigrip D2, Kabar, Buck 110 etc. Have used the shaft of a 1/4" "chrome vanadium" screwdriver as a butcher's steel. Seems to work very well. Am I missing something? Is there a reason I should buy a real "steel". 5-6 swipes and they pop hair again. Is a larger diameter better? You guys obviously know what your doing. What do you think?