The DDU★★★ bond is specifically designed for drilling into New Zealand fibreboard & cladding, masonry & brick and concrete. It is a quick and easy solution for coring holes with conventional rotary drill motor (over 1kW).

• Diameter: 38 mm
• ½" female back-end (can also be manufactured for standard R½" and 1¼" core drill barrels)
• Usable length (L2): 150 mm

• Use a conventional rotary drill motor (over 1kW) and a speed range of 1,000-3,000 rpm. Do not use with hammer action.
• For optimal result, insert pilot rod after drilling pilot hole with masonry drill bit. This prevents the core drill bit from moving when starting to drill, ensures a cleaner hole and a longer drill bit lifetime. It will also make the operation safer and reduce physical stress.

Not the right size? For other diameters of this spec of dry core drill bits for concrete and masonry, see our full range of DDU★★★.