Drill bit AWTools SDS‑MAX 20 x 400 x 540 mm, square shank AW43829

SDS‑MAX drill bit by AWTools with a 20 mm diameter, 400 mm working length and 540 mm total length designed for heavy‑duty drilling in masonry and concrete. The bit features an SDS‑MAX shank with a square contact profile that ensures secure engagement in compatible rotary hammers and effective transfer of impact force. It is intended for through drilling, anchor holes and preparatory work on construction and renovation sites where long reach and sustained drilling performance are required.

Advantages

The solid construction and robust carbide tip provide reliable drilling performance in hard materials while reducing breakage risk. The SDS‑MAX square shank design maintains stable positioning in the tool chuck and improves energy transfer from the rotary hammer to the cutting head. Extended working length allows drilling deeper holes without changing bits frequently, and the overall length gives comfortable handling and reach for common construction tasks.

Suitable for

• Drilling through masonry and concrete for anchor installation
• Pre‑drilling for dowels and rebar dowel placement
• Creating long‑reach holes in renovation and retrofit work
• Heavy‑duty drilling with SDS‑MAX rotary hammers on construction sites

Key specifications

• Diameter: 20 mm
• Working length: 400 mm
• Total length: 540 mm
• Shank type: SDS‑MAX with square contact profile
• Material: carbide tip on a hardened steel body (designed for masonry/concrete)

How to use

Install the bit into an SDS‑MAX compatible rotary hammer according to the tool manufacturer’s instructions, ensuring the shank locks securely in the chuck. Select appropriate drilling speed and impact settings for concrete or masonry, apply steady axial pressure and allow the hammer action to drive the bit without excessive force. Withdraw periodically to remove dust and improve cooling when drilling deep holes. After use, clean debris from the flute and tip and store the bit in a dry place to prevent corrosion.

Usage recommendations

Use personal protective equipment including safety glasses, hearing protection and dust mask when drilling. Match the drill mode and power of the rotary hammer to the bit size and material. For reinforced concrete, use measured, controlled feed and verify anchor hole dimensions before installing fixings.