The push and pull diamond impregnated bit is a specialized tool that is commonly used in underground drilling for a variety of reasons, such as service holes for air, water, paste fill or sand fill.

It is a much larger, bi-directional bit with a diamond matrix. The push and pull bit is used to expand the diameter of a bore hole once a diamond drill has accurately drilled a pilot hole in a common standard size such as NWL.

• Saves time – it is much easier and quicker to expand an existing smaller hole than to drill a large diameter hole.
• Can be used with smaller underground drill rigs.
• Causes less vibration resulting in less wear and tear on equipment.