The Craftsman are alright, certainly better than the BM kit, but Trust me, they will deform. I went through 2 of them in a matter of a week and they both got F'd up with normal use on several knives. The Wihas are still in use after over a year and show virtually no form of wear whatsoever. You can get a set of 6(t6,7,8,9,10,15) for $16 and save plenty of hassle. Actually a T6 and a T10 would cover most everything.