As much as it might look like one, this isn't a spark plug gap tool. It's actually used to check the bevel angle of knives or tools that require sharpening. Just put the edge of a blade into the gaps and you can gauge how steep or shallow the blade's shape is versus the angle you're shooting for. Toolmonger
Measure twice, cut once. This week’s edition of Top Tools is all about the accuracy. There’s a micro-drill set for model makers; a bevel gauge to make sure you’ve got the right angle; and dowel tips that make centering a breeze. Our friends at toolmonger.com round up the whole collection here.