I needed a drill bit rack for Machine Screw length drills and setup to hold very commonly used drill sizes. Including fractional, number and letter drills 1/2" to #36, ones used for tap and clearance sizes. Made from some scrap 1/8" thick 6061 T6 Alu 4" x 3", Arrow shaft - spacers, 4ea. #8-32 st/st screws. Fun little project.