In the line of prisonrazors, the best known is probably the Gillette Psycho. Basically, a Tech with a fat, hollow handle, only openable with a key. As the razors were sold in boxes of ten razors and one key, most that are around do not have one.
The reason they need a key is that the inmates, or in the case of mental institutions the patients, could not get their hands on the blade. As mine did not have one, I made one of an allenscrew, two nuts and a drop of superglue. Ugly, but functional. As I still hope to find a complete set of 10 at an affordable price some day, I decided not to get the Razor Emporium replica key.
Shave: reasonably mild, as can be expected of a Tech.
The reason they need a key is that the inmates, or in the case of mental institutions the patients, could not get their hands on the blade. As mine did not have one, I made one of an allenscrew, two nuts and a drop of superglue. Ugly, but functional. As I still hope to find a complete set of 10 at an affordable price some day, I decided not to get the Razor Emporium replica key.
Shave: reasonably mild, as can be expected of a Tech.