BenchK ladder screws with Fischer expansion plugs for secure wall mounting of BenchK climbing walls. Suitable for both pre-assembly and through-mounting. The BenchK ladder screws with Fischer expansion plugs consist of two components: The expansion wings of the red element ensure expansion and extra protection for the gray element made of high-quality nylon. The result is highly load-bearing screws that are easy to screw in and tighten for a secure attachment of climbing walls. The risk of over-tightening is also avoided, and the shaped edge of the pin prevents it from falling into the hole. Additionally, the serrated shape on the side of the plug prevents it from rotating during installation. 8-piece set compatible with series: BenchK 110, BenchK 210, BenchK 510. 12-piece set compatible with series: BenchK 310, BenchK 710. Do you want to attach the ladder screws to panel materials? Then please ensure that the unthreaded part of the screw is not longer than the thickness of the attached element.