I have one in the link below and have used without fail for 40yrs, Clean with a toothbrush and lube.

https://www.amazon.com/Chef-Craft-21118-2PK-Compact-Butterfly/dp/B007UZ0FMQ/ref=sr_1_141?crid=2SPTM7SRM7PJF&keywords=mechanical+can+opener&qid=1574451513&sprefix=mechanical+can+oppener%2Caps%2C969&sr=8-141