I bought a couple of fake Kershaw Whirlwind copies at a flea market a year ago. They were $ 5.00 ea. and marked EDC made in China. I'll admit, I'm not a discriminating user of knives, and since the copy operated exactly like my real Kershaw, I planned on using them as a knockaround knife in place of my Kershaw. I found out that quality DOES matter. Parts aren't parts and this particular copy wasn't suitable as a replacement for my use as a pants pocket clip edc , for two primary reasons. The handle material was a rubbery material with a non-slip surface instead of a smooth hard plastic like Kershaws, so it was too tackey and hung up when I tried to pull it out of my pants pocket. The second reason was the pocket clip had a stronger spring, this was great as far as security against accidental loss, but again made it a pain to deploy the knife. I tried to carry the knife for a week, but it just wasn't working for me and they ended up in a drawer.
The irony of this was after 10 years of edc carrying, I finally did misplace/lose my Kershaw Whirlwind about 6 months after buying the copies. I tried to use one of these copies, but after a week, I got on E-bay and picked up a used Kershaw Blackout for $ 28.00 to replace my lost Kershaw. (the Kershaw was 'real' and sold with a box lot of police, 6 impounded miscellaneous knives. The other 5 knives were basically junkers, so I gave them to my 15 year old son.