I've had the exact opposite experience, that type of extractor pretty much relies on brute force whereas a screwdriver (or small pocketknife) uses easily controlled (and limited) leverage. A few mm on the left, a few mm on the right, repeat maybe once and the chip is out.
..not to confuse that useless extractor with a quality PLCC extractor which you really shouldn't do without in the event you need to extract a PLCC chip.
Couldn't agree more. And if you ignore what Tone said and try to attack it in the center to pry out the chip, you'll end up boring the blade down which could accidentally cut some traces on the board

The "brute force" extractor I only use on small-ish chips. Something as large as the Kickstart chip and you're asking for trouble as it often slips, screws the pins up worse AND ends up piercing your fingers :mad: