Based on this product's specifications, here are some alternatives and similar models
Screwdriver STANLEY FATMAX flat 5.5 x 100 mm FMHT0-62641
Summary description:
Flat screwdriver STANLEY FATMAX with a 5.5 mm blade width and 100 mm blade length (model FMHT0-62641). Designed for driving and removing slotted screws, it features a flat tip sized for standard slotted fasteners. Suitable for general repair, assembly and maintenance tasks in workshops, construction and household use.