by raimundo » 17 Feb 2010 9:11
the seven pin tumbler tubular key lock is a based on a circle divided into eight equal parts,
the stem pickup for the boltworks, is the center of the 8th division,
However, there are two 7 pin variants where this is not true, that is the offset left and offset right versions, special picks are sold for each of these variants, but you would only be wasting your money buying the offset picks if you have an eight pin pick, the stem pickup for the eight pin pick will open the offset varients.
an eight pin tubular pick will open both the offset 7pin right and left versions. you will still need the seven pin tool to open the common seven pin centered version, and you would need the undersize and the oversized versions of these if you really want to cover the whole bunch of them. dont forget that the diameters do change on some of these so don't go forcing a tool onto a stem that is too big for it.
Wake up and smell the Kafka!!!