These core bits have extended barrels to drill into deep walls. The smaller diameters will also help electricians and plumbers to drill through double walls in 1 action to fit conduit pipes or plumbing pipes. They are especially useful in the walls of older building where the middle may be loose-filled. Once drilled through, the pipe can be inserted as the core bit is withdrawn to help avoid fall-back of the loose fill. They use standard dry core bit 1/2" BSP fittings. Use a power drill without hammer action and with a clutch or torque limiter. Ideal power would be 1kW or more, especially for the 107mm size. A pilot drill is not used with these extended core bits.

Specification:

• Premium diamond segments
• Laser welded segment joins for strength
• Slotted or turbo style segments for faster cutting..
• External spiral dust feed to push dust to back.
• Takes standard dry core bit fitments 1/2"BSP male adaptors.
• Ideal for most wall stone, brick and concrete.

Also Available: We stock a range of accessories for dry core bits.