The Wiha 27626 2817 4.0 X 104mm Sys.4 Sf Handle is a precision-engineered screwdriver handle designed for Sys.4 interchangeable blades. With a size of 4.0 X 104mm, it offers comfortable grip and control for various tasks. Its Sys.4 compatibility allows for easy swapping of blades to suit different screw types and sizes, making it a versatile tool for professionals and DIYers alike. Crafted by Wiha, a trusted name in tool manufacturing, this handle ensures durability and reliability for long-term use.