Tac-force knives are cheap junk , I have a good deal of them and various other brands which come from the same factory. I collect them for looks and to me they're just novelties.
Never buy any tac-Force folder as a knife or you'll be dissapointed, my brother continues to do this once a month even though he knows he'll have to do the exact same thing next month.
If you want to start collecting this just for looks junk like I do, the cutlery corner network is your best friend ( that's the knife show on tv ) you can get a set of pretty much one of everything for 1$ or less per knife. And if a particular knife comes in multiple colors you can get a discount for buying one of each.