These units are designed for downwards drilling, espcially shaft sinking operations.  The are Australian designed and built according to exact engineering and qualiy standards.  They are specially designed for power assisted drilling under an appropriately designed frame.

Stingers are designed to partially mechanise the drilling process by pneumatic powered extension and retraction of the airleg unit.  This improves the drilling times and manual handling aspects of the shaft sinking process.  Two different extension lengths are available. Units are used on mining and construction shaft sinking projects.