Universal Guardrail by Tie Down Safety fits over 95% of competitor bases in the market. Getting the job done and using with other safety products, including our competitors, is the number one priority. The multi-pin slot feature of the Tie Down Guardrail System allows for the railing to fit a variety of competitors bases. Tie Down Safety maintains high standards and quality control through quality raw materials and components made in the USA. Tested to Category 5 hurricane wind forces. Meets OSHA 1926.502, 1910 Subpart D.