The Bosch TS4036 features a wide assortment of screwdriver bits to fit most common applications. Alls bits are Bosch extra hard bits which are hardened to resist breakage. The Bosch Ultra-Compact Brute Tough case is strong enough to resist breakage if dropped, and compact enough for easy storage. All internal case trays and inserts are moveable and removable so you can customize and optimize your storage needs.