Use as a straight/extension ladder (L-2094-17: 9 to 15; L-2094-22: 7" to 11"), twin stepladder or stairway ladder (L-2094-17: 4" to 7"; L-2094-22:3" to 5") and plank support (L-2094-17: 1" to 4"; L-2094-22:1" to 2"). Includes heavy duty locking pins andquick activating snap-lock hinge. Provides stability and versatility for the most demanding projects.