i have 7 Osters. wife bought them for me and for presents from sams/costco. the screw is very thin. they will not pull older corks that tend to stick. if the cork is a bid dry, parts of the cork are broken off and get up in the works. the corkscrew will not work then. i could take apart the corkscrew i bought at aldi's, but it died after a year(probably 1500-2000 bottles).
we are on oster #4. sam/costo take them back. we do not give them as presents. i presume oster is dumping them.