Re: Is This A Spline Key??
There are a lot of metal mixes in locks, e.g. the brass/zamak wheels in La Gard locks. I have also an old German combination lock which came with its original steel spline key. Nonetheless I also feel more comfortable with a brass spline key.
In case you wonder ... Martin Hewitt is a fictional detective in stories by Arthur Morrison:
Martin Hewitt, Investigator Chronicles of Martin Hewitt
Martin Hewitt, Investigator Chronicles of Martin Hewitt