raimundo wrote:pencils dont contain lead, only graphite. brass contains copper and zinc, and a small amount of lead that makes for easier machining. the copper in locks and door knobs tends to kill bacteria with its admittedly toxic properties, be sure to wash your hands before eating after handling green (verdigris) copper.
He actually specified "old" pencils, which did use lead. I still find it amusing swiping solder across paper and seeing it mark.
The BiLock isn't the first bump proof pin tumbler because it isn't a pin tumbler.
And it's called a shear line, not a "sheerline".