Designed for larger tools with shaft sizes 5/16" and greater — ideal for organizing oversized screwdrivers, heavy-duty drivers, and specialty hand tools with wider handles or larger shafts Wider tool spacing accommodates bulkier handles and larger tool profiles — perfect for professional toolboxes where extra clearance and easier tool access are important Integrates seamlessly with Screwdriver Pro organizers — combine standard and XL sections to create a fully customized screwdriver, nut driver, and specialty tool organization system Excellent for nut drivers, pry bars, insulated drivers, all-in-one drivers, demo drivers, and other large-handled tools — a flexible solution for mechanics, technicians, electricians, and serious DIY users Cleated base provides a secure hold in toolbox drawers — helps keep organizers in place during drawer movement, transport, and daily shop use, Manufacturer: Ernst Manufacturing