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: 172 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.