Manual screwdriver Single Ratchet screwdriver Wera 05104650001

An 8-piece countersink bit set in a sturdy plastic case for deburring, chamfering and countersinking. The bits are made with material elasticity tuned for durability, provide efficient chip removal and reduce tilt risk for comfortable operation. Cutting geometry follows DIN 335-C, 90° with three cutters. The set includes a high-quality ergonomic bit holder with magnet and a Rapidaptor quick-release chuck for fast, tool-free bit changes. Shank: 1/4" hexagon, compatible with holders conforming to DIN ISO 1173-D 6.3.

Advantages

Durable construction due to optimized material elasticity, reliable cutting performance with DIN 335-C, 90° three-flute geometry, and efficient chip evacuation that minimizes clogging and tilt. Ergonomic, magnetic bit holder improves handling, while the Rapidaptor quick-release chuck enables rapid bit changes without extra tools. Compact plastic case provides organized storage and transport protection.

Suitable for (tasks / use cases)

• Deburring milled, drilled or punched holes on metal and non-ferrous materials
• Chamfering edges before assembly or welding
• Countersinking for flush screw seating in wood, plastic and metal thin sheets
• Use in workshops, assembly lines and maintenance tasks requiring quick bit changes

Key specifications

• Set contents: 8 countersink bits (various sizes)
• Cutting geometry: DIN 335-C, 90°, 3 cutters
• Shank: 1/4" hexagon
• Holder compatibility: DIN ISO 1173-D 6.3
• Chuck: Rapidaptor quick-release
• Storage: stable plastic case

How to use

Select a countersink bit of the required size and insert its 1/4" hex shank into the Rapidaptor quick-release chuck until it locks. Secure the bit holder if using the included magnetic ergonomic holder. Start the drill or driver at low speed to establish the countersink, then increase speed as appropriate while applying steady, moderate pressure. Periodically clear chips for consistent cutting and inspect the countersink for correct depth and angle.

Usage recommendations

Use appropriate personal protective equipment (safety glasses and gloves) and select the countersink size and speed according to the material being worked. For best results on metals, maintain steady feed and clear chips frequently; for delicate materials, use lower speeds and minimal pressure.