The guardrail post is made from an in-house designed aluminum profile with high functionality and low weight as a result. The passive locking, GuardLock, ensures locking in the guardrail bracket. The unique profile maximizes the strength in the direction that the guardrail post needs the most strength. Thanks to the smart design, the guardrail post can be mounted in a number of different ways: in rectangular sockets, in circular sockets or by attaching only one of the flanges on the short side so that the opposite side is free for the largest possible flexibility. The guardrail holder can be easily adjusted in height and the markings on the post sticker help guide to the correct position. The guardrail holders work passively by holding the guardrail in place, but it is also possible to actively lock the guardrail by tightening the guardrail holders with a nut driver. The result is a bluntly mounted guardrail. The guardrail holders can lock one or two guardrails, and can also handle wooden studs as well as guardrail guides (standing pipes) in aluminum or steel.