Drill bit set Bosch HSS metal 35-piece Extra Hard in KS cassette (MPN 2607017726)

The Bosch 35-piece HSS metal drill bit set Extra Hard in a KS cassette provides a comprehensive selection of high-speed steel bits for drilling in metal. Designed for professional and DIY applications, the set contains a range of sizes suitable for general metalwork, offering heat resistance and wear protection needed for repeated drilling in steel and other ferrous materials. The KS cassette keeps bits organized and protected during storage and transport.

Advantages

The HSS composition delivers greater hardness and thermal stability compared with standard drills, reducing wear during continuous use. The Extra Hard labelling indicates a manufacturing tolerance and treatment aimed at extended lifetime under demanding conditions. The compact KS cassette arranges bits by size for quick selection and helps prevent damage when carrying the set to job sites or storing it in a workshop.

Suitable for

• Drilling holes in mild and hardened steel
• General metal fabrication and repair
• Workshop and on-site maintenance tasks
• DIY metal projects requiring durable, heat-resistant bits

Key specifications

• Material: high-speed steel (HSS) for enhanced hardness and heat resistance
• Set size: 35 individual drill bits covering a range of common diameters for metal drilling
• Label: Extra Hard specification indicating increased wear resistance
• Storage: KS cassette for organized storage and transportation
• Application: intended for drilling in steel and other ferrous materials

How to use

Select the appropriate drill bit diameter for the hole required and secure it in the drill chuck. Clamp the workpiece firmly and mark the drilling point. Use a center punch if necessary to prevent the bit from wandering. Start drilling at a low speed to establish the hole, then increase speed as appropriate for the material and bit size. Apply cutting lubricant when drilling thick or hard steels to reduce heat and prolong bit life. Withdraw the bit periodically to clear chips and allow cooling.

Usage recommendations

For best performance, use appropriate cutting fluid, maintain correct feed and speed, and replace bits showing significant wear or chipping. Store the bits in the KS cassette to protect cutting edges and maintain size order. Wear suitable personal protective equipment such as safety glasses and gloves when drilling.