Up to 5x more precise than a Bosch CYL-3 drill bit. Modern construction sites require employees to work with many different materials and you never know what you'll need to drill next. Finding the right drill bit can be difficult and time consuming - unless you have the Expert Multi Construction drill bits. The extremely versatile drill bits in this set allow precise drilling in hard materials, such as granite, without slipping. This is made possible by their sharp point and advanced geometric design. They have been manufactured from optimised carbide using our fine grinding process and are therefore equally suitable for concrete, brick, soft tiles, wood and metal. Regardless of the material, they always perform professionally. The Bosch Expert Hex-9 Multi Construction drill bits are the only drill bits you should always have to hand: You can complete every employee with precision and never waste time searching for the drill bit you need. This set is supplied in a plastic holder that you can snap into a pick and click case. This keeps the drill bits safely stored in your customised toolbox. Hexagonal shank for a strong connection and maximum torque transmission in three-jaw chucks and 1/4 inch hexagon socket tool holders.