Originally Posted by Camaro 69

I'd like to see some information on how the lock tumblers can cut teeth on a plastic key blank. Because if what you're saying could actually be done, it would be so simple to rip off someones car that way. I've rebuilt a few lock assemblies before, and if you've ever been inside one before, you'd understand my skepticism. A car lock contains a handful of spring loaded wafer tumblers that slide sideways inside the lock barrel. With the key out, those tumblers stick out past the outside of the barrel and fit into a slot on the lock body, and that's what keeps it from turning. With the key in, the tumblers ride against the keys teeth, and each one is cut a specific length so that they are all retracted inside the barrel leaving the outside smooth, then the barrel can be turned. So how would a blank key know what the height of each tooth needs to be to retract the tumblers? Not to mention, the lock doesn't contain any cutting device to cut teeth.

Originally Posted by Camaro 69

A car lock contains a handful of spring loaded wafer tumblers that slide sideways inside the lock barrel. With the key out, those tumblers stick out past the outside of the barrel and fit into a slot on the lock body, and that's what keeps it from turning. With the key in, the tumblers ride against the keys teeth, and each one is cut a specific length so that they are all retracted inside the barrel leaving the outside smooth, then the barrel can be turned.

Originally Posted by Stevolwevol

What about using a cordless reciprocating saw and cutting them out?

Originally Posted by BudBrown

depends on where you cut, it might ruin the tops.