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BenchK KM4 Fischer Expansion Plugs & Screws (4 pcs.)

by BenchK

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For BenchK Wood Swedish Ladders (Series 1)

A well-known German manufacturer of fastening systems offers DUOPOWER pins and guarantee an excellent fixing thanks to the use of high-quality nylon that automatically activates optimal holding function and spreader wings.

The spreader wings of the red element provide expansion and additional protection of the gray element. Easily screwed in and tightened at the end. No risk of over-tightening the pin. The molded edge of the pin prevents it from falling into the hole. The set consists of 4 sets (dowel with screw).


  • Concrete
  • Solid brick
  • Solid Silicate brick
  • Aerated Concrete
  • Bricks with Vertical Perforation
  • Perforated Silicate Brick
  • Plasterboard
  • Gypsum Plasterboards and Gypsum Fiber Board
  • Light Concrete Hollow Block
  • Hollow-Core Slabs of Brick and Concrete
  • Natural Stone
  • Particle Board
  • Full Gypsum Board
  • Solid Bricks Made of Lightweight Concrete


    • DUOPOWER pins are suitable for both pre-assembly and push-through assembly.
    • The combination of two different materials of the dowel affects their various properties (expansion, folding and looping), which allows the use of additional substrates and obtaining the highest load capacity in them.
    • The required screw length results from the length of the plug + thickness of the fastened element + 1x screw diameter.
    • Wood screws, chipboard screws and hanger bolts can be used for the dowels.
    • In the case of fastening to board materials, the unthreaded part of the screw must not be longer than the thickness of the fastened element.
    • It is not recommended to use when the thickness of the wall is less than 12 cm (4,7″).


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