Drill bit DeWalt DT6818-QZ 400 mm length, single piece

DeWalt DT6818-QZ 400 mm is a single-piece SDS-Max flat chisel designed for heavy-duty chiselling, channelling and demolition in concrete, reinforced concrete and hard stone. Its fully hardened steel point and chisel face provide high wear resistance and consistent performance, while the special "Stay Sharp" tip maintains a long-lasting edge for extended tool life.

Advantages

The hardened, shock-resistant steel construction minimises breakage under repeated impact and increases productivity by preserving the chisel profile during extended use. The long 400 mm length gives added reach for deep channels and demolition tasks where access is limited.

Suitable for

• Chiselling and shaping concrete and reinforced concrete
• Creating channels for piping and conduits
• Demolition and removal of hard stone or masonry sections
• Use with SDS-Max rotary hammers for heavy-duty applications

When it may not be suitable

This SDS-Max flat chisel is intended for heavy-duty impact tools and is not suitable for light-duty drilling in wood, metal or masonry without an SDS-Max hammer. It may be excessive for small repair jobs where a shorter or lighter chisel would be more convenient.

Key specifications

• Type: SDS-Max flat chisel (single piece)
• Length: 400 mm
• Material: fully hardened, wear-resistant steel
• Tip: reinforced "Stay Sharp" chisel tip for prolonged edge retention

How to use

Install the chisel into the SDS-Max chuck of a compatible rotary hammer following the tool manufacturer's instructions. Position the chisel point on the work surface and apply controlled hammer action; use steady, guided strokes to remove material while maintaining balance and tool control. For safety, wear eye protection, hearing protection and gloves, and ensure the workpiece is secure before applying impact force.

What to consider before purchase

• Compatibility with your rotary hammer's SDS-Max chuck
• Whether a 400 mm length is appropriate for access and control in your tasks
• Material type to be worked (concrete, rebar-containing concrete, stone)

Usage recommendations

Use the DeWalt SDS-Max flat chisel with appropriately rated heavy-duty rotary hammers and replace the chisel when excessive wear or deformation reduces effectiveness. Keep the chisel bit clean and inspect regularly for cracks or chips to maintain safe operation.