FRETS.COM
Shop Tip #158
© Frank Ford 2006; Photo by FF

Here's a trick I learned from an old timer in Berkeley.  Next time you see one of these old cheap hand drills at a garage sale, buy it.  Then chuck up a regular countersink and hang it on the wall.   You'll be surprised at how often you grab it to debur, chamfer or countersink a hole. . .