When would I want to use a Twin blade versus a Single blade model hole cutter?

[hpadmin]

The single blade Hole Cutter models, with the balance bars appear more difficult to use than the twin blade models. When would I want to use a single blade model instead of a twin blade model?

[hpadmin]

Hole Pro also has two single blade CL models which are recommended when there is a need to also cut holes in heavy gauge sheet metal as the single blade design requires less torque from the hand drill.

The twin-blade models work better for most applications. They cut twice as fast and do not require the use of multiple length balance bars to counter balance the cutting blade as with single blade designs.