Drill bits and wrench socket holders

Added drill bit and wrench socket holders for Modular Gridfinity storage for hex bits, 1/8, 1/4, 8mm bits, or small parts by Martin_au. Designed for the following sizes (with 0.2mm diameter increase for tolerance):2 mm3.25 mm4 mm5 mm6 mm7 mm8 mm9 mm10 mmAs for the wrench socket holders, I attached two version (One with 3 socket holders, and the other with 2 holders).