Drill Bit Set ALPEN 5–10 mm spiral for steel and concrete, model 0080700007100, 6 pcs

6-piece ALPEN spiral drill bit set with diameters 5, 6, 7, 8, 9 and 10 mm, designed for drilling in steel and concrete. The spiral flute geometry promotes efficient chip removal and reduces clogging during drilling. Bits are intended for use with compatible rotary and hammer drills where the drill type permits, providing accurate hole diameters for a range of construction, renovation and metalworking tasks.

Advantages

This drill bit set combines a range of common diameters in a single pack to reduce the need for frequent tool changes on site. Spiral flutes help evacuate chips and dust from both metal and masonry applications, improving drilling progress and reducing heat build-up. The standardized cylindrical shanks fit most common chucks, allowing use with a wide variety of rotary and hammer drills. The set is suitable for situations that require consistent hole size and reliable performance across mixed materials.

Suitable for

• Drilling holes in steel and other metals
• Drilling into concrete, brick and masonry
• Construction and renovation tasks requiring precise hole diameters
• Metalworking and fabrication where common metric sizes are needed
• Use with rotary drills and hammer drills where indicated

Key specifications

• Set composition: six drill bits, sizes 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm
• Tip and flute type: spiral flutes for improved chip removal
• Material compatibility: suitable for steel and masonry (concrete, brick)
• Shank type: straight cylindrical shank for standard drill chucks
• Intended drill types: compatible with rotary drills and hammer drills where permitted

How to use

Select the drill bit with the required diameter for the hole. Secure the bit in the drill chuck ensuring proper centring and tight clamping. For metal drilling, use steady feed pressure and appropriate cutting speed; for masonry, use the hammer function where available and recommended. Start with a pilot or reduced speed if accuracy is critical, clear chips periodically, and avoid excessive force to prevent bit breakage. Finish by cleaning the hole and, if necessary, deburring edges.

Usage recommendations

Use appropriate personal protective equipment (eye protection, gloves and dust mask) when drilling. Apply cutting lubricant or coolant when drilling steel to extend bit life and reduce heat; do not use lubricant when drilling masonry. Match drill speed and feed to the material and bit diameter, and replace worn bits to maintain accuracy.