Expansive bits are used regularly in projects that require a selection of drill bits of different sizes.
For example, expansive bits are used by plumbers and electricians, as they often need to drill through wooden boards to create pathways for cables (either individually or in a wider bundle).
They are also used to create round mortises in doors to accommodate lock mechanisms. They are ideally suited to this task thanks to the ease with which they can be adjusted to drill the holes for the lock and the handles.
For a DIYer, owning an expansive bit means saving money, as it eliminates the need to buy a large number of different wood bits.
Expansive bits can be used to bore holes in softwood, hardwood, plastic and light building materials such as plasterboard.
