The main function of the mousehole is to hold pipe during stand building or breakdown. Mouseholes are designed to use the area below the drill floor and are flush-mounted with the drill floor on installation. Cameron mouseholes are available in a range of designs:

• fixed
• telescopic
• rotating
• colt
• rabbit
• rotary-mounted fixed.

All types can be equipped with the following:

• hydraulic centralizer/spring-powered centralizer
• toolbox or bit breaker
• torque wrench to make and break connections while building and breaking stands, respectively
• patented shock absorber.