True of resistors, but not of radial leaded capacitors, switches, small hardware, connectors, etc. You never have to use them, but it can make the space allocation work better.I have found that using dividers doesn't work. You can't get the resistors in a half drawer without bending the leads
Harbor Freight has many storage options for very good prices.
and thought that it did not come with one because of the way that line is wordedIt connects easily with ground cord and an adjustable wrist strap.