A long time ago, in an issue far, far away…the May 2014 issue of KITPLANES, to be exact…The Home Shop Machinist covered the ins and outs of using the Quantum jig to DIY drill bolt heads for safety ...

1 - The Modding Toolbox: A Guide to Drill Bits 2 - Speciality Bits: Centre Drills and Countersinks 3 - Big Holes: Stepped Drills and Hole Saws Next Hello everybody, and welcome to what I hope will ...