Hex bit holder with extension bar for Gridfinity

a hex bit holder for 29 hex bit and the extension bar for 1*3 gridfinity base. Magnet installation:u should pause the print at layer 56 for install 12 nos. of 20*10*2mm magnets, and pause the print at layer 71 for install 2 nos. of 20*10*2mm magents. Or you can just ignore the magents room.