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DP350 Series Aluminum Dual Purpose Ladder

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The DP350 Series Switchback ladder is two ladders in one: Step Ladder and extension ladder. Rated at 225lb load capacity, the dual purpose ladder features equivalent reach heights to a 16 ft extension ladder and a 7 ft step ladder. Easily flip the lightweight ladder between Step Ladder and extension ladder position and click the lock arms in place. Large TRACTION-TRED® steps are comfortable to stand on and are slip resistant.


  • Locking hinge enables multiple ladder styles
  • Telescoping design for multiple working heights

Performance Overview

StyleSizeExtension HeightNumber of Positions
Dual Purpose MultiLadder7 ft13 ft2


Rails DimensionFlange DimensionRungs DimensionSteps Dimension
3 in x 3/4 in3/4 in3 in3 in


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Set-up of some positions requires additional equipment, not included Designed for one or two person jobs. Note: When used as a double stepladder, the maximum load per side, including person and materials, shall not exceed the duty rating of ladder


Different types of ladders are designed to keep you safe and productive when climbing or standing. Using the wrong style of ladder or simply ignoring the limitations of climbing equipment can result in a fall or serious injury.
Height is referring to the actual ladder height. Extension ladders should be 7 to 10 feet longer than the highest support or contact point, which may be the wall or roof line. The highest standing level is four rungs down from the top. The highest permitted standing level on a stepladder is two steps down from the top.

Reach height is the maximum reach assuming a 5’6” person with a vertical 12” reach.
Ladders are designed to safely hold up to a specific amount of weight. The Werner Performance System defines five different capacities using a color and star rating system. The Duty Rating is defined as the maximum safe load capacity of the ladder. A person’s fully clothed weight plus the weight of any tools and materials that are carried onto the ladder must be less than the load capacity.

Werner offers ladder made from fiberglass and aluminum. Each material has characteristics which make it best for certain applications, or one material may simply fit the personal preferences of the user. For example, if working around electricity users should select fiberglass products due to their non-conductive side rails.