selim wrote:Your right, but the thinner blank is made to pass a few different keyway's. I think it's called multi - plex
Multi-plexing is when a lock manufacturer designs several blanks and a master blank that fits all of them. It's used in (large) master key systems.
Usually these blanks have generally the same shape , but some of the ridges (wards) are different. The master blank just has less of (or none of) the ridges.
In this situation , it's several different keyways from various manufacturers. Silca and other key blank companies make a blank that fits in a lot of different , but similar keyways.
These blanks are much thinner than the original blanks. That is why they are more likely to break in daily use. They should be ok for impressioning , if you're carefull.
Have a look at the Ultra-Lite keys that Silca has. They are made from a softer aluminium alloy , they should be easier to impression with. But again , not recommended for daily use.
The UL050 will probably not fit the Corbin lock. They have a different keyway than most.