Drill bit set ALPEN APTMS 3 — concrete spiral bits 3-piece: 5 mm, 6 mm, 8 mm, 1/4" shank

The ALPEN APTMS 3 drill bit set contains three concrete spiral bits with diameters 5 mm, 6 mm and 8 mm, each fitted with a 1/4" (6.3 mm) hex shank for quick-change chucks. These bits are engineered for drilling into concrete and masonry using rotary or hammer drills and are suitable for common construction and renovation tasks such as installing anchors, routing pipes and laying cable conduits. The spiral flute geometry helps remove dust while drilling and the hex shank ensures secure grip in quick-change adapters and bit holders.

Advantages

The set provides a compact selection of frequently used diameters for anchor and fixture installation in concrete and masonry. Spiral flutes improve debris extraction to maintain drilling efficiency, while hardened tips and a robust shaft deliver consistent penetration and longer service life under typical site conditions. The 1/4" hex shank permits fast bit changes and compatibility with quick-change chucks and impact drivers that accept hex shanks.

Suitable for

• Drilling holes for masonry anchors and plugs in concrete and brick
• Installing electrical conduits and plumbing fixtures through masonry walls
• General renovation and construction drilling tasks requiring 5, 6 or 8 mm diameters
• Use with rotary drills and hammer drills that accept 1/4" hex shanks and quick-change systems

Key specifications

• Bit diameters: 5 mm, 6 mm, 8 mm
• Shank type: 1/4" (6.3 mm) hex
• Intended material: concrete and masonry
• Flute design: spiral for dust removal
• Compatibility: rotary and hammer drilling modes with quick-change chucks

How to use

Select the bit diameter appropriate for the anchor or conduit, insert the 1/4" hex shank into a compatible quick-change chuck or adapter and secure it. When drilling concrete, start with the drill in rotary mode or use hammer mode for faster progression in hard masonry. Apply steady, moderate pressure and periodically withdraw the bit to clear dust and prevent overheating. For accurate positioning, mark the drilling point and use a perpendicular drilling angle. After drilling, clean the hole of debris before inserting anchors or conduits.

Usage recommendations

Use appropriate personal protective equipment such as safety glasses, dust mask and hearing protection. Match drill mode to material hardness and avoid excessive lateral force on the bit. For prolonged heavy-duty drilling, allow intermittent cooling pauses to extend bit life.