The Bosch TS4023 provides an assortment of drilling and driving bits to fit most common applications. With an industrial thick titanium coating, Bosch titanium drill bits have a 6x longer life in general drilling than standard drill bits. Also included in an assortment of Bosch extra hard screwdriver bits which are hardened to resist breakage. All internal case trays and inserts are moveable and removeable so you can customize and optimize you storage needs. Includes: 3/16 in. Titanium Drill Bit 7/32 in. Titanium Drill Bit 15/64 in. Titanium Drill Bit 1/4 in. Titanium Drill Bit 3/8 in. Titanium Drill Bit (6) Phillips 1 in. Insert Bits (6) Slotted 1 in. Insert Biits (3) Phillips 2 in. Insert Bits (2) Squared 2 in. Insert Bits 1/4 in. Hex Extension Compact Brute-Tough Case.