SCREW SLOT FILES by FRIEDR. DICK GMBH are precision tools designed for making delicate screw slots, with six sizes and two styles to accommodate various needs.
The set includes a Joint File for edge cuts without widening the slot and an Equalling File to clean and square the slot sides, available in matched pairs or a Master Set of twelve.
These files are very thin, 5-5/8" (14.3cm) long, and require careful handling as they are easily bent or broken, with no guarantee against damage.