Up to 5x more precise than a Bosch CYL-3 Drill Bit Accurate drilling is easier with Bosch Centering Geometry Hex shank for a strong connection and maximum torque transmission in three-jaw chucks and ¼" internal hex tool holders Ideal for drilling holes into multiple materials. Can be used in impact mode on concrete and stone, and on rotary setting for brick, soft ceramic tile, sheet metal, wood and plastic Scope of delivery: EXPERT HEX-9 Multi Construction Drill Bit Set, 5.5 x 60 x 100; 6 x 60 x 100; 6 x 60 x 100; 7 x 60 x 100; 8 x 50 x 100 mm, 5 pcs