Long Kelly Bar for Auger Rig

I need a drill round locking Kelly Bar specifically designed for construction drilling, to be used with an auger drilling rig. The Kelly Bar needs to be over 12 meters in length.

Requirements:
- Must be suitable for construction drilling
- Designed for use with an auger drilling rig
- Length: over 12 meters
- Durable and robust construction to withstand heavy-duty use

Ideal Skills and Experience:
- Experience in designing and fabricating drilling equipment
- Knowledge of construction drilling requirements
- Familiarity with auger drilling rigs