I have had hooks open up using 6x tippit. They where #22 & #24 "generic" clones of the TMC 2488. After 3 in one day I tossed all I had with me in the trash and the rest of the unused ones when I got home. I have never had an issue with name brand hooks. (TMC, Daiichi, Mustad, Kamasan), Dai-Riki is good but I find an occasional bad point)