In the Sonic Foam System, tools are stored in a well organized, chemical resistant, CNC machined foam inlay. They are quickly accessible for fast workability, ergonomically laid out, and feature a two-tone color system for convenient survey of missing tools. Sonic screwdrivers include ergonomic tri-lobe plastic handles with a rubber oversold for a comfortable grip. Chrome Vanadium shafts ensure durability for years of use. (600513, 600513-CE)