We’re not sure about Mike Cook’s statement that obsidian is the sharpest substance known to science, but the rock is sharp enough to be used as a razor fresh off a chunk. No crafting needed.
The Remington Touch Control Beard and Stubble Trimmer has an LED touch screen for viewing and toggling the trim length and speed. Skip to 0:40 in the video to see its other features.
Awesome Stuff from Technabob, MightyMega and 95Octane